#muon atlas

[fytpop]

[emeraldbabygirl]

Atlas being comedians again plus Muon breaking the mic stand

[tpop]

Poom, Muon, Nice & Erwin promo images for the new Atlas single. 

[spacetimewithstuartgary]

Can unknown physics be seen in interactions between Higgs bosons?

Since the launch of the Large Hadron Collider, there has been ongoing research there into Higgs bosons and a search for traces of physics beyond the existing model of elementary particles. Scientists working at the ATLAS detector has combined both goals: with the latest analysis it has been possible to expand our knowledge of the interactions of Higgs bosons with each other, and stronger constraints on the phenomena of ‘new physics’ have been found.

An undisputed success of the Large Hardon Collider (LHC) is the discovery of the last missing element of the Standard Model: the Higgs boson, responsible for the origin of the mass of elementary particles. There is also a disappointment: the persistent absence of any trace of physics beyond this model. Scientists at the facility of the European Organisation for Nuclear Research (CERN) in Geneva are therefore trying to conduct their current research in such a way as to combine more precise measurements of the properties of the Higgs boson with further searches for ‘new physics’. The study just published is an example of this approach. In it, physicists from the ATLAS experiment focused on events leading to the creation of two Higgs bosons, which would then decay into multiple particles of the lepton family (mainly electrons and muons). The results are presented in the Journal of High Energy Physics.

The production of Higgs boson pairs can occur within the Standard Model itself. It is such a rare process here that it has not been possible to observe it in the data collected so far. There are, however, theoretical models describing phenomena beyond the Standard Model, predicting the production of Higgs boson pairs with a higher probability. Observing instances of this sort of production using data already collected would confirm the existence of a hitherto unknown class of physical phenomena. It is therefore not surprising that for the scientists in the ATLAS experiment, this very process became the starting point for the analysis described above.

“Experimental studies of the interactions of Higgs bosons with each other encounter a fundamental problem. It is this: in proton collisions at the LHC, Higgs bosons appear so infrequently that so far not a single event of Higgs boson pair production has been detected, which at first glance seems absolutely necessary if we want to look at interactions between these particles. How, then, can we study a phenomenon that has not yet been observed?” asks Dr. Bartlomiej Zabinski, a physicist at the Institute of Physics of the Polish Academy of Sciences (IPJ PAN) who coordinated the international team responsible for this analysis.

Within the Standard Model, increasingly precise predictions can be made about the probabilities of various known processes. A rationale for suggesting unexpected properties of Higgs bosons or the existence of new physics would be a discrepancy between theoretical predictions and actual data from the LHC detectors. Operating solely within the framework of the Standard Model, the physicists in the ATLAS experiment therefore simulated (together with the background) the signals that should appear in the detectors in the event of two Higgs boson phenomena, and then normalised the results according to the expected amount of data coming from their detector. The final step was to compare the values thus obtained with those derived from previous observations. The use of machine learning based on decision trees helped in the search for these rare processes.

“Our analysis of double Higgs boson production events in the final state with multiple leptons complements the studies already carried out on other final states. So far, we have not noticed anything in the data from our detectors that disagrees with the Standard Model. However, this result does not rule out the possibility of the existence of ‘new physics’ phenomena, but only informs us that their possible influence on the production of Higgs boson pairs remains too weak to be seen in the data collected so far,” concludes Dr. Zabinski.

In the coming years the LHC is to undergo a major upgrade. The intensity of the beams will then increase tenfold, resulting in a significant increase in the number of recorded proton collisions. The limitations imposed by the current analysis on the production and parameters describing the interactions of Higgs bosons allow physicists to hope that perhaps already at the beginning of the next decade it will be possible to select the first events of double Higgs production from more data and to verify today's predictions in direct observations of the phenomenon.

On the Polish side, the research was co-financed by the National Science Centre.

The Henryk Niewodniczański Institute of Nuclear Physics (IFJ PAN) is currently one of the largest research institutes of the Polish Academy of Sciences. A wide range of research carried out at IFJ PAN covers basic and applied studies, from particle physics and astrophysics, through hadron physics, high-, medium-, and low-energy nuclear physics, condensed matter physics (including materials engineering), to various applications of nuclear physics in interdisciplinary research, covering medical physics, dosimetry, radiation and environmental biology, environmental protection, and other related disciplines. The average yearly publication output of IFJ PAN includes over 600 scientific papers in high-impact international journals. Each year the Institute hosts about 20 international and national scientific conferences. One of the most important facilities of the Institute is the Cyclotron Centre Bronowice (CCB), which is an infrastructure unique in Central Europe, serving as a clinical and research centre in the field of medical and nuclear physics. In addition, IFJ PAN runs four accredited research and measurement laboratories. IFJ PAN is a member of the Marian Smoluchowski Kraków Research Consortium: “Matter-Energy-Future”, which in the years 2012-2017 enjoyed the status of the Leading National Research Centre (KNOW) in physics. In 2017, the European Commission granted the Institute the HR Excellence in Research award. As a result of the categorization of the Ministry of Education and Science, the Institute has been classified into the A+ category (the highest scientific category in Poland) in the field of physical sciences.

IMAGE: Secondary particle tracks recorded during a proton collision inside the ATLAS detector, indicating the presence of a single Higgs boson in the event. Credit Source: IFJ PAN / CERN / ATLAS Experiment

[swissforextrading]

CMS experiment at CERN weighs in on the W boson mass

CMS experiment at CERN weighs in on the W boson mass The CMS experiment at CERN is the latest to weigh in on the mass of the W boson – an elementary particle that, along with the Z boson, mediates the weak force, which is responsible for a form of radioactivity and initiates the nuclear fusion reaction that powers the Sun. At a seminar held at CERN today, the CMS collaboration reported how it has analysed proton–proton collision data from the second run of the Large Hadron Collider, the Laboratory’s flagship particle accelerator, to make its first mass measurement of this fundamental particle. The result is the most precise measurement of the W mass made so far at the LHC, and is in line with the prediction from the Standard Model of particle physics and with all previous measurements, except the measurement from the CDF experiment at the former proton–antiproton Tevatron collider at Fermilab. In the Standard Model, the W mass is related closely to the strength of the interaction unifying the electromagnetic and weak forces and to the masses of the Higgs boson and the top quark, which constrain its value to 80353 million electronvolts (MeV) within an uncertainty of 6 MeV. Measuring the W boson mass with high precision therefore makes it possible to test whether or not these properties all align in a way that is consistent with the Standard Model. If they don’t, the cause could be new physics phenomena such as new particles or interactions. Since its discovery at CERN about 40 years ago, the W boson has had its mass measured ever more precisely by several collider experiments, including ATLAS and LHCb at the LHC. In 2022, a surprisingly high value of its mass measured by the CDF experiment plunged the particle into a “midlife crisis”. The CDF W boson mass, 80433.5 MeV with an uncertainty of 9.4 MeV, differed significantly from the Standard Model prediction and from the other experimental results, calling for more studies. In 2023, the ATLAS collaboration, which provided its first W boson mass measurement in 2017, released an improved measurement based on a reanalysis of proton–proton collision data from the first run of the LHC. This improved result, 80366.5 MeV with an uncertainty of 15.9 MeV, lined up with all previous measurements except the CDF measurement, which remains the most precise to date, with a precision of 0.01%. The CMS experiment has now contributed to this global endeavour with its first W boson mass measurement. The keenly anticipated result, 80360.2 with an uncertainty of 9.9 MeV, has a precision comparable to that of the CDF measurement and is in line with all previous measurements except the CDF result. “The wait for the CMS result is now over. After carefully analysing data collected in 2016 and going through all the cross checks, the CMS W mass result is ready,” says outgoing CMS spokesperson Patricia McBride. “This analysis is the first attempt to measure the W mass in the harsh collision environment of the second running period of the LHC. And all the hard work from the team has resulted in an extremely precise W mass measurement and the most precise measurement at the LHC.” “W mass measurements are very challenging, involving delicate measurements and theoretical modelling of the production of the W boson and its decay into a lepton (here, a muon) and a neutrino that escapes detection,” explains incoming CMS spokesperson Gautier Hamel de Monchenault. “By exploiting the ability of the CMS detector to measure muons with high precision and using the latest and most advanced theoretical ingredients, some of which were tested by a cross-checking analysis, we attained this record level of precision.” The result showcases once again the exceptional performances of the LHC and its detectors, which continue to push the precision frontier and put the Standard Model and its extensions to ever more stringent tests. Further data from the… https://home.cern/news/press-release/physics/cms-experiment-cern-weighs-w-boson-mass (Source of the original content)

[capitalism-is-parasitism]

Fifth force: what update?

FROM 2023: The tantalising theory that a fifth force of nature could exist has been given a boost thanks to unexpected wobbling by a subatomic particle, physicists have revealed.

According to current understanding, there are four fundamental forces in nature, three of which – the electromagnetic force and the strong and weak nuclear forces – are explained by the standard model of particle physics.

However, the model does not explain the other known fundamental force, gravity, or dark matter – a strange and mysterious substance thought to make up about 27% of the universe.

Now researchers have said there could be another, fifth, fundamental force of nature.

Dr Mitesh Patel, from Imperial College London, said: “We’re talking about a fifth force because we can’t necessarily explain the behaviour [in these experiments] with the four we know about.”

The data comes from experiments at the Fermilab US particle accelerator facility, which explored how subatomic particles called muons – similar to electrons but about 200 times heavier – move in a magnetic field.

Patel says the muons behave a bit like a child’s spinning top, in rotating around the axis of the magnetic field. However, as the muons move, they wobble. The frequency of that wobble can be predicted by the standard model.

But the experimental results from FermiLab do not appear to match those predictions.

Prof Jon Butterworth of University College London, who works on the Atlas experiment at the Large Hadron Collider (LHC) at Cern, said: “The wobbles are due to the way the muon interacts with a magnetic field. They can be calculated very precisely in the standard model but that calculation involves quantum loops, with known particles appearing in those loops.

“If the measurements don’t line up with the prediction, that could be a sign that there is some unknown particle appearing in the loops – which could, for example, be the carrier of a fifth force.”

The findings follow previous work from FermiLab that showed similar results.

But Patel said there was a “fly in the ointment”, noting that between the first results and the new data, uncertainty has increased around the theoretical prediction of the frequency.

That, he said, could shift the situation. “Maybe what they are seeing is standard scientific thinking – the so-called standard model,” Patel said.

There are other issues. Butterworth said: “If the discrepancy is confirmed, we will be sure there is something new and exciting but we won’t be sure exactly what it is.

“Ideally the discrepancy would inform new theoretical ideas that would lead to new predictions – for example, of how we might find the particle that carries the new force, if that’s what it is. The final confirmation would then be building an experiment to directly discover that particle.”

The experiments at Fermilab are not the only ones to suggest the possibility of a fifth force: work at the LHC has also produced tantalising findings, albeit with a different type of experiment looking at the rate at which muons and electrons are produced as certain particles decay.

But Patel, who worked on the LHC experiments, said those results were now less coherent.

“They are different experiments, measuring different things, and there may or may not be a connection,” he said.

Butterworth added that the unexpected frequency of the muons’ wobbles was one of the longest-standing and most significant discrepancies between a measurement and the standard model.

“The measurement is a great achievement, and very unlikely to be in error now,” he said. “So if the theory predictions get sorted out, this could indeed be the first confirmed evidence for a fifth force – or something else strange and beyond the standard model.”

[rentalbuildingkid]

ประวัติวงATLAS

7 หนุ่มบอยแบนด์น้องใหม่ TPOP ตัวแทนพลังความมุ่งมั่น สังกัดค่ายเดียวกับ 4EVE

วง ATLAS (แอทลาส) บอยแบนด์น้องใหม่ล่าสุด ของวงการ T-pop จาก ค่าย XOXO Entertainment สังกัดเดียวกับ เกิร์ลกรุ๊ปอันดับ 1 อย่าง 4EVE (โฟร์อีฟ) วง ATLAS รวม Member 7 หนุ่ม มิวอ้อน , เออร์วิน, แทด, ไนซ์, ภูมิ, เจ็ท, จูเนียร์ ต่างคาแรกเตอร์ แต่รวมกันเป็นหนึ่งเดียว พวกเขาทั้ง 7 คือตัวแทนของพลังแห่งความมุ่งมั่น กล้าที่จะท้าทาย พร้อมที่จะสร้างสรรค์ เหมือนเป็น นักสำรวจ ที่จะพาทุกคนออกเดินทางเพื่อค้นพบประสบการณ์ใหม่ ๆ และสนุกไปกับแนวทางดนตรีของพวกเขา

หลายปีที่ 7 หนุ่ม ATLAS ทุ่มเทฝึกฝน และค้นหาเส้นทางของตัวเอง วันนี้พวกเขาพร้อมแล้วกับ Single แรกที่ Produce โดย มืออาชีพของวงการเพลง NINO, เบนและปั้นจากวง LUSS รวมทั้ง กอล์ฟ F.HERO มาร่วมผจญภัย และค้นพบโลกใหม่ไปด้วยกัน กับกับพวกเค้าทั้ง 7 คน ใน Single MAYDAY MAYDAY

ATLAS สมาชิก : จำนวน 7 คน ได้แก่ มิวอ้อน , เออร์วิน, แทด, ไนซ์, ภูมิ, เจ็ท, จูเนียร์ (MUON, ERWIN, TAD, NICE, POOM, JET, JUNIOR) แนวทาง : วง Boyband ที่มีแนวทางดนตรี Hiphop Dance Electronic สังกัด : XOXO ENTERTAINMENT

ที่มาของชื่อวง ATLAS มี 2 ความหมาย ความหมายที่ทางยุโรปคุ้น คือ เทพ Titan ที่แบกโลกไว้ อีกความหมายคือ แผนที่ ส่วนพวกเรา ATLAS คือ ‘นักสำรวจโลกและดวงดาว และเรื่องราวต่างๆ’ ที่จะพาทุกคนร่วม Explore ไปด้วยกัน

พวกเขา รวมตัวกัน จากการเคยเป็นเด็กฝึกด้ยกันมาก่อน จนหมดสัญญา แต่ทุกคนก็ยังคงสนิทกัน และรวมกลุ่มฝึกร้องฝึกเต้นกันด้วยตัวเองอย่างต่อเนื่องสม่ำเสมอ จนมาเริ่มต้นใหม่กับ ค่าย XOXO ได้เทรนเพิ่ม และเตรียมพร้อมอย่างหนัก เป็นเวลากว่าหลายเดือน เพื่อทุ่มเทให้กับ Single แรกนี้

Character & Material จูเนียร์ – หนุ่มสุดขรึม มั่นคง เป็นผู้ใหญ่ที่สุดในวง - หิน (ความมั่นคง) เจ็ท – หนุ่มอบอุ่น ขี้อาย ใจเย็น – ไม้ (ความสงบ) แทด – หนุ่มน้อยขี้อ้อน ร่าเริง - พลาสติก (ความยืดหยุ่น) เออร์วิน – หนุ่มทะเล้น หน้าเป็น แต่สู้ไม่ถอย - เหล็ก(Steel) (ความแข็งแกร่ง) ภูมิ – หนุ่มอารมณ์ดี ยิ้มง่าย สดใส - คริสตัล (ความแวววาว) ไนซ์ – หนุ่มเท่ มาดกวน – เงิน (ความแพรวพราว) มิวอ้อน – หนุ่มน้อยขี้เล่น เสน่ห์แพรวพราว - ทอง (ความเร้าใจ)

ต้องบอกว่าเป็นการรวมตัวของ 7 หนุ่ม 7 สไตล์ ถึงแม้จะมีคาแรกเตอร์แตกต่างกัน แต่เมื่อมาอยู่รวมกันกลับลงตัวและสมบูรณ์แบบมากๆ พวกเขาถือเป็นตัวแทนของคนรุ่นใหม่ ที่มีพลังแห่งความมุ่งมั่น กล้าที่จะท้าทาย พร้อมที่จะสร้างสรรค์ เพื่อให้แฟนเพลงทุกคนได้ค้นพบประสบการณ์ใหม่ๆ และสนุกไปกับแนวทางดนตรีของพวกเขา The Concert เชื่อว่าในอนาคต ATLAS ต้องปังระเบิดตามรอยรุ่นพี่อย่างแน่นอน เพราะนี่คือดาวดวงใหม่แห่งวงการเพลง T-Pop

ขอบคุณที่เป็นกำลังใจให้พวกเราในทุกเรื่องๆ ทุกช่วงเวลาไม่ว่าเราจะยิ้มหรือแม้ตอนที่เราเหนื่อยมากๆ พวกเราจะตั้งใจทำผลงานดีๆ เพื่อแฟนๆ ทุกคนเลยครับ ฝากติดตามด้วยนะครับ หวยเด็ด

[spacenutspod]

The IceCube Neutrino Observatory, operated by the University of Wisconsin-Madison (UW-M), located at the Amundsen–Scott South Pole Station in Antarctica, is one of the most ambitious neutrino observatories in the world. Behind this observatory is the IceCube Collaboration, an international group of 300 physicists from 59 institutions in 14 countries. Relying on a cubic kilometer of ice to shield from external interference, this observatory is dedicated to the search for neutrinos. These nearly massless subatomic particles are among the most abundant in the Universe and constantly pass through normal matter. By studying these particles, scientists hope to gain insight into some of the most violent astrophysical sources – such as supernovae, gamma-ray bursts, merging black holes and neutron stars, etc. The group of scientists tasked with advising the U.S. government on particle physics research is known as the Particle Physics Project Prioritization Panel (P5). In a recent draft report, “Pathways to Innovation and Discovery in Particle Physics,” the P5 team recommended a planned expansion of IceCube. This recommendation is one of several that define the future of astrophysics and particle physics research. The report also recommends support for a separate neutrino experiment based in Illinois called the Deep Underground Neutrino Experiment, along with multiple projects at CERN’s Large Hadron Collider, the Vera C. Rubin Observatory, the Cherenkov Telescope Array, and the development of next-generation ground-based telescopes to observe the cosmic microwave background (CMB). The P5 advisors include two UW–Madison faculty members, Tulika Bose and Kyle Cranmer, and UW–Madison physicists also hold leading roles in the projects listed above. A view of the IceCube Lab with a starry night sky showing the Milky Way and green auroras. Credit: Yuya Makino, IceCube/NSF Bose is an experimental particle physicist who works on the Compact Muon Solenoid experiment at the LHC. Her research is focused on the search for exotic particles, Dark Matter, and Standard Model measurements. Cranmer’s research is similarly focused on the search for exotic particles and physics beyond the Standard Model, which included the ATLAS experiment at the LHC. Together with their P5 colleagues, the two spent much of the last year assessing the future of particle physics and recommending projects that would help advance the field. One of the chief concerns of the P5 panel is how the federal government could maximize the limited funding it allocates to particle physics research over the next decade. This is one of the main reasons for the recommended IceCube expansion, colloquially named ICECube-Gen2. As they indicate in their report, an upgrade to the current observatory would be a relatively cost-effective way to improve the scientific community’s ability to detect and analyze neutrinos: “IceCube-Gen2 also has a strong science case in multi-messenger astrophysics together with gravitational wave observatories… The South Pole, a unique site that enables the world-leading science of CMB-S4 and IceCube-Gen2, must be maintained as a premier site of science to allow continued US leadership in these areas.” “Using new technology and taking advantage of the brilliant ice that we can model with ever higher precision, IceCube-Gen2 can expand the detection volume by a factor of eight for a cost comparable to IceCube,” said Albrecht Karle, a UW–Madison physics professor who is leading the IceCube upgrade in a UW-M press release. In addition to supporting an IceCube expansion and other major experiments, the panel recommended an improved funding balance between projects of all sizes, a more aggressive research and development program that could lead to a next-generation particle accelerator, and broadening the nation’s advanced technology workforce. Bose indicated that she is particularly excited by the prospect of a new particle accelerator, which could potentially be located in the U.S. “I am excited by the bold long-term vision presented in the P5 report,” she said. “Such a collider would be an unparalleled global facility that will provide new insights into the mysteries of our quantum universe.” The P5 panel’s recommendations are now being reviewed by the High Energy Physics Advisory Panel (HEPAP), part of the U.S. Department of Energy (DoE), which is scheduled to meet on December 8th to discuss the recommendations. An online version of the P5 report can be found here on the DoE’s website, and a 2-page summary can be found on the HEPAP site here. Further Reading: University of Wisconsin-Madison The post Scientists are Recommending IceCube Should be Eight Times Bigger appeared first on Universe Today.

[innervision-dai]

ATLAS 「Boys Do Cry」 Official MV

『T-POP OF THE YEAR Music Awards 2022』で”最も人気のある男性グループ”に

選ばれたり、日本のレーベルと組んだぽい、タイのボーイズグループ・ATLASの新曲。

曲はメンバーのMuonさんがデモを書いてきた曲で、それに4MIX「Hot & Cold」や

4EVE「หยดน้ำตา (Tears)」とかを手掛けたWorachet Thanupongcharatさんが作曲、

Kavin Siripatarakhunさんがプロデュースに参加した、ポップロック調の曲ですって。

歌詞は、”いつも強さを求められがちな男だって傷ついたり泣いたりすることがある”が

テーマみたいです。MVではATLASのメンバーが怒り、悲しみ、傷ついて泣いた後に･･･

ピクサー映画『インサイド・ヘッド』みたいに乗り越えるまでを描いていて、泣けます！

T-POPグループの新曲では、NEW COUNTRY「รบกวนเอ็นดู (Tokyo Cut ) Remix」や

PiXXiE x bamm「L.I.T」も好きです。あとゴッホより普通に、ラッセンと十勝が好きー！

[jellow0rld]

higgs boson data signature visualisation in ATLAS, simulated particle collision in ATLAS, particle collision simulation in ATLAS, lead ion collision simulation in ALICE, simulated higgs boson decay in the compact muon solenoid detector at CERN

[fytpop]

[emeraldbabygirl]

WHO THE FUCK LET ERWIN PERFORM WITHOUT A SHIRT ERWIN WHO WHO FUCKING SAID GO OUT WITHOUT A SHIRT PLEASE IM SCREAMING SO LOUD ON THE INSIDE AND THE SMIRKS FROM JUNIOR AND MUON AND FUCKING JET AND HIS EYEBROW WIGGLE PLEASE I WANNA CRAWL IN A HOLE IM INTERNALLY CRYING AND KICKING MY LEGS THIS ERA IS KILLING ME HELP ATLAS CHILL PRETTY PLEASE IM SCARED

Actual photo of me hiding in the corner trying not to die over this new era help I 💀💀💀💀

[tpop]

Offroad on the cover of Kazz again? Damm boy looks so good. And we also have cutie Muon on the cover and Tad of Atlas.

[scienza-magia]

Quinta forza fondamentale per l'unificazione del Tutto

L’intuizione di una quinta forze diventa sempre più reale. L’allettante teoria secondo cui potrebbe esistere una quinta forza della natura ha ricevuto una spinta grazie all’oscillazione inaspettata di una particella subatomica, hanno rivelato i fisici. Secondo l’attuale comprensione, ci sono quattro forze fondamentali in natura, tre delle quali – la forza elettromagnetica e le forze nucleari forti e deboli – sono spiegate dal modello standard della fisica delle particelle, quindi sono prevedibili sulla base di questa legge e si parla di “unificazione delle forze”. Il modello però non spiega l’altra forza fondamentale nota, la gravità, o meglio la sua spiegazione non è completa e richiede la famosa materia oscura, che costuirebbe il 27% dell’universo. Ora i ricercatori hanno detto che potrebbe esserci un’altra, quinta, fondamentale forza della natura, che aiuterebbe a spiegare le altre quattro. Il dottor Mitesh Patel, dell’Imperial College di Londra, ha dichiarato: “Stiamo parlando di una quinta forza perché non possiamo necessariamente spiegare il comportamento con le quattro che conosciamo”.

I dati provengono da esperimenti presso la struttura dell’acceleratore di particelle statunitense del Fermilab, che ha esplorato il modo in cui le particelle subatomiche chiamate muoni – simili agli elettroni ma circa 200 volte più pesanti – si muovono in un campo magnetico. Patel dice che i muoni si comportano un po’ come la trottola di un bambino, ruotando attorno all’asse del campo magnetico. Tuttavia, quando i muoni si muovono, oscillano. La frequenza di tale oscillazione dovrebbe essere prevista dal modello standard della fisica. Bisognerebbe essere in grado di prevederle. Ma i risultati sperimentali del FermiLab non sembrano corrispondere a queste previsioni. Il prof. Jon Butterworth dell’University College di Londra, che lavora all’esperimento Atlas al Large Hadron Collider (LHC) del Cern, ha dichiarato: “Le oscillazioni sono dovute al modo in cui il muone interagisce con un campo magnetico. Possono essere calcolati in modo molto preciso nel modello standard, ma tale calcolo coinvolge loop quantistici, con particelle note che compaiono in quei loop. “Se le misurazioni non si allineano con la previsione, potrebbe essere un segno che c’è qualche particella sconosciuta che appare nei circuiti – che potrebbe, ad esempio, essere il portatore di una quinta forza”. I risultati seguono il lavoro precedente di FermiLab che ha mostrato risultati simili. Se fossero ulteriormente confermati ci sarebbe la prova che qualcosa interagisce con queste particelle, cioè un’altra forza non prevista dal modello standard. Si tratta però di costruire un esperimento ad hoc per rilevare e misurare questa forza, e questo è il lavoro della fisica sperimentale. Gli esperimenti al Fermilab non sono gli unici a suggerire la possibilità di una quinta forza: anche il lavoro all’LHC ha prodotto risultati allettanti, anche se con un diverso tipo di esperimento che guarda alla velocità con cui vengono prodotti muoni ed elettroni quando determinate particelle decadono . Ma Patel, che ha lavorato agli esperimenti LHC, ha affermato che quei risultati ora sono meno coerenti. In questo caso però gli esperimenti erano stati mirati ad altre ricerche, quindi i risultati non appaiono perfettamente coerenti con quelli del Fermilab. Non sappiamo quindi quello che verrà scoperto, ma se lo sarà, comunque, sarò la più importante scoperta della fisica degli ultimi 100 anni. Read the full article

[laopiniononline]

Chilenos serán parte del experimento de física de partículas más importante del mundo

Nueva publicación en https://ct2.cl/8v

Chilenos serán parte del experimento de física de partículas más importante del mundo

La Universidad Técnica Federico Santa María fabricará en nuestro país detectores para el Solenoide Compacto de Muones, uno de los cuatro experimentos del Gran Colisionador de Hadrones del CERN.

Nuestro país alcanzó un importante hito con la incorporación de la Universidad Técnica Federico Santa María, a través de su Centro Científico Tecnológico de Valparaíso (CCTVal), a uno de los experimentos de física de partículas más importantes del mundo. Se trata del Solenoide Compacto de Muones (CMS, por su sigla en inglés), uno de los cuatro experimentos del Gran Colisionador de Hadrones (LHC), del Centro Europeo para la Investigación Nuclear (CERN), situado en Suiza, cerca de la frontera con Francia.

El CMS es un detector de partículas que produce un intenso campo magnético y que detecta, especialmente, muones con alta precisión. Dentro de sus objetivos se encuentran expandir los conocimientos sobre la estructura fundamental de la materia y las fuerzas que rigen el universo.

“Trataremos de fabricar en Chile detectores para el CMS, una tecnología altamente precisa y con un costo cercano al medio millón de dólares. Mi deseo es construir cerca del 10% de los detectores con jóvenes científicos e ingenieros chilenos”, señala el Dr. William Brooks, académico del Departamento de Física de la USM y líder de la nueva colaboración con el CERN.

Este experimento tiene grandes implicancias teóricas y prácticas, y contribuye al entendimiento general de la física y del mundo que nos rodea. Además, el conocimiento y las tecnologías desarrolladas en el CMS pueden tener aplicaciones en campos como la medicina, la energía y la informática, entre otras.

Tecnología nacional

La USM ha jugado un rol relevante en investigación y desarrollo para el LHC, específicamente para el experimento ATLAS. Fue precisamente el resultado exitoso en este proyecto, que tuvo una duración de 8 años, el que permitió la integración de la casa de estudios como miembro del CMS.

El Dr. William Brooks, también director del CCTVal, encabezará el grupo nacional de especialistas, compuesto por los físicos Esteban Molina, Claudio San Martín y Valentina Vega, además del Dr. Cristian Peña, exalumno de la USM que se desempeña como investigador en Fermilab y es integrante de CMS desde hace más de 10 años. Ellos trabajarán en la colaboración donde, actualmente, participan más de 5 mil personas provenientes de 251 instituciones de 59 países del mundo.

El mayor desafío, según el experto, está en alcanzar la precisión de la tecnología utilizada por el CMS. Cada uno de los dispositivos que componen los detectores deben ser instalados sin usar directamente las manos, por lo que se requieren equipos similares a pequeñas grúas que tienen un valor aproximado de 250 millones de pesos.

“Ya construimos detectores sTGC para el CERN, que en este momento están funcionando. La diferencia está en la tecnología, que es más compleja, pero aun así podemos hacerlo”, comenta el investigador.

Fermilab

Otra de las ventajas de trabajar en el CMS, indica el Dr. Brooks, es la integración de la USM al Fermi National Accelerator Laboratory (Fermilab), ubicado en Illinois, Estados Unidos, y que es el “laboratorio más avanzado en física de partículas en ese país y el segundo más importante del mundo después del CERN”.

El Fermilab, fundado en 1967 y donde participan más de 50 países, realiza experimentos en aceleradores de partículas altamente avanzados que buscan responder a preguntas fundamentales respecto a la física y al universo.

[swissforextrading]

CMS experiment at CERN weighs in on the W boson mass

CMS experiment at CERN weighs in on the W boson mass The CMS experiment at CERN is the latest to weigh in on the mass of the W boson – an elementary particle that, along with the Z boson, mediates the weak force, which is responsible for a form of radioactivity and initiates the nuclear fusion reaction that powers the Sun. At a seminar held at CERN today, the CMS collaboration reported how it has analysed proton–proton collision data from the second run of the Large Hadron Collider, the Laboratory’s flagship particle accelerator, to make its first mass measurement of this fundamental particle. The result is the most precise measurement of the W mass made so far at the LHC, and is in line with the prediction from the Standard Model of particle physics and with all previous measurements, except the measurement from the CDF experiment at the former proton–antiproton Tevatron collider at Fermilab. In the Standard Model, the W mass is related closely to the strength of the interaction unifying the electromagnetic and weak forces and to the masses of the Higgs boson and the top quark, which constrain its value to 80353 million electronvolts (MeV) within an uncertainty of 6 MeV. Measuring the W boson mass with high precision therefore makes it possible to test whether or not these properties all align in a way that is consistent with the Standard Model. If they don’t, the cause could be new physics phenomena such as new particles or interactions. Since its discovery at CERN about 40 years ago, the W boson has had its mass measured ever more precisely by several collider experiments, including ATLAS and LHCb at the LHC. In 2022, a surprisingly high value of its mass measured by the CDF experiment plunged the particle into a “midlife crisis”. The CDF W boson mass, 80433.5 MeV with an uncertainty of 9.4 MeV, differed significantly from the Standard Model prediction and from the other experimental results, calling for more studies. In 2023, the ATLAS collaboration, which provided its first W boson mass measurement in 2017, released an improved measurement based on a reanalysis of proton–proton collision data from the first run of the LHC. This improved result, 80366.5 MeV with an uncertainty of 15.9 MeV, lined up with all previous measurements except the CDF measurement, which remains the most precise to date, with a precision of 0.01%. The CMS experiment has now contributed to this global endeavour with its first W boson mass measurement. The keenly anticipated result, 80360.2 with an uncertainty of 9.9 MeV, has a precision comparable to that of the CDF measurement and is in line with all previous measurements except the CDF result. “The wait for the CMS result is now over. After carefully analysing data collected in 2016 and going through all the cross checks, the CMS W mass result is ready,” says outgoing CMS spokesperson Patricia McBride. “This analysis is the first attempt to measure the W mass in the harsh collision environment of the second running period of the LHC. And all the hard work from the team has resulted in an extremely precise W mass measurement and the most precise measurement at the LHC.” “W mass measurements are very challenging, involving delicate measurements and theoretical modelling of the production of the W boson and its decay into a lepton (here, a muon) and a neutrino that escapes detection,” explains incoming CMS spokesperson Gautier Hamel de Monchenault. “By exploiting the ability of the CMS detector to measure muons with high precision and using the latest and most advanced theoretical ingredients, some of which were tested by a cross-checking analysis, we attained this record level of precision.” The result showcases once again the exceptional performances of the LHC and its detectors, which continue to push the precision frontier and put the Standard Model and its extensions to ever more stringent tests. Further data from… https://home.web.cern.ch/news/press-release/physics/cms-experiment-cern-weighs-w-boson-mass (Source of the original content)