Long awaited: LHCb has seen discrepancies for years in the angular distributions of B→Kμμ signatures (so in transitions of bottom to strange quarks) that definitely do not agree with the prediction. #CMSPaper 1360 now confirms the LHCb measurements https://buff.ly/3OnJSHe
November 27, 2024 at 1:03 PM
Long awaited: LHCb has seen discrepancies for years in the angular distributions of B→Kμμ signatures (so in transitions of bottom to strange quarks) that definitely do not agree with the prediction. #CMSPaper 1360 now confirms the LHCb measurements https://buff.ly/3OnJSHe
#CMSPaper 1366 examines a large sample of particle jets for behaviour inconsistent with the standard model, using ambitious unsupervised, weakly supervised and semi-supervised #machinelearning methods. They were usually more sensitive than 'classic' particle physics methods https://buff.ly/3CZwpmr
January 27, 2025 at 1:03 PM
#CMSPaper 1366 examines a large sample of particle jets for behaviour inconsistent with the standard model, using ambitious unsupervised, weakly supervised and semi-supervised #machinelearning methods. They were usually more sensitive than 'classic' particle physics methods https://buff.ly/3CZwpmr
This account is now active. For the next couple of days, we'll post recent #CMSPaper and #CMSPAS from the last couple of months. Afterwards, it will post the latest results from @cmsexperiment.bsky.social just like x.com/cmspapers and mastodon.social/@cmspapers.
x.com
June 15, 2025 at 12:16 PM
This account is now active. For the next couple of days, we'll post recent #CMSPaper and #CMSPAS from the last couple of months. Afterwards, it will post the latest results from @cmsexperiment.bsky.social just like x.com/cmspapers and mastodon.social/@cmspapers.
CMSPaper 1366 examines a large sample of particle jets for behaviour inconsistent with the standard model, using ambitious unsupervised, weakly supervised and semi-supervised #machinelearning methods. They were usually more sensitive than 'classic' particle physics methods https://buff.ly/3CZwpmr
February 3, 2025 at 6:22 PM
CMSPaper 1366 examines a large sample of particle jets for behaviour inconsistent with the standard model, using ambitious unsupervised, weakly supervised and semi-supervised #machinelearning methods. They were usually more sensitive than 'classic' particle physics methods https://buff.ly/3CZwpmr
The LHC produces a large number of Z bosons. So it is worthwhile checking if some of them behave inconsistently with the standard model. This #CMSPaper measured that the chance that Z bosons decay to two different kinds of leptons is smaller than one in 10 million arxiv.org/abs/2508.07512
November 7, 2025 at 1:03 PM
The LHC produces a large number of Z bosons. So it is worthwhile checking if some of them behave inconsistently with the standard model. This #CMSPaper measured that the chance that Z bosons decay to two different kinds of leptons is smaller than one in 10 million arxiv.org/abs/2508.07512
The W and Z bosons, discovered in 1983, are essential for studying the weak force. #CMSPaper 1365 examines simultaneous production of a W and Z boson to test their interactions. Results are compared to the best calculations available, showing only a few percent uncertainty https://buff.ly/3Vx8CAN
January 26, 2025 at 6:22 PM
The W and Z bosons, discovered in 1983, are essential for studying the weak force. #CMSPaper 1365 examines simultaneous production of a W and Z boson to test their interactions. Results are compared to the best calculations available, showing only a few percent uncertainty https://buff.ly/3Vx8CAN
Particles that contain four quarks (greek: 4=tetra) are called tetraquarks. This #CMSPaper studies the internal spin structure of a tetraquark particle containing of charm (anti) quarks. Our data hints suggest that the quarks are closely packed inside, not in separate lumps arxiv.org/abs/2506.07944
July 20, 2025 at 5:22 PM
Particles that contain four quarks (greek: 4=tetra) are called tetraquarks. This #CMSPaper studies the internal spin structure of a tetraquark particle containing of charm (anti) quarks. Our data hints suggest that the quarks are closely packed inside, not in separate lumps arxiv.org/abs/2506.07944
#CMSPaper 1351 describes how CMS decides to keep which 1000 (ish) out of the 40 million LHC potential collisions. Obviously, we don't want to discard anything exciting, so it's not as easy as it sounds, and there are strong computer constraints https://buff.ly/3YmMXfm
November 14, 2024 at 1:03 PM
#CMSPaper 1351 describes how CMS decides to keep which 1000 (ish) out of the 40 million LHC potential collisions. Obviously, we don't want to discard anything exciting, so it's not as easy as it sounds, and there are strong computer constraints https://buff.ly/3YmMXfm
#CMSpaper: Angular analysis of the B⁰ → K*⁰(892) μ⁺μ⁻ decay in proton-proton collisions at √s = 13 TeV (arXiv:2411.11820) arxiv.org/abs/2411.11820 #BPhysics
November 21, 2024 at 7:27 AM
#CMSpaper: Angular analysis of the B⁰ → K*⁰(892) μ⁺μ⁻ decay in proton-proton collisions at √s = 13 TeV (arXiv:2411.11820) arxiv.org/abs/2411.11820 #BPhysics
Greetings from the train to my vacation 🎿
Still finishing some urgent things that affect people, like grant reviews and reference letters, before going offline fully. Don’t worry, through the powers of internet scheduling I might still be posting about every #cmspaper
Still finishing some urgent things that affect people, like grant reviews and reference letters, before going offline fully. Don’t worry, through the powers of internet scheduling I might still be posting about every #cmspaper
February 28, 2026 at 9:49 AM
Greetings from the train to my vacation 🎿
Still finishing some urgent things that affect people, like grant reviews and reference letters, before going offline fully. Don’t worry, through the powers of internet scheduling I might still be posting about every #cmspaper
Still finishing some urgent things that affect people, like grant reviews and reference letters, before going offline fully. Don’t worry, through the powers of internet scheduling I might still be posting about every #cmspaper
#TOTEM is a set of detector elements that are placed along the LHC beam line to measure protons that did not break up in the LHC collision (amongst others). #CMSPaper 1363 describes how those protons are reconstructed, identified and measured exactly. https://buff.ly/3ZpPEgG
January 16, 2025 at 1:03 PM
#TOTEM is a set of detector elements that are placed along the LHC beam line to measure protons that did not break up in the LHC collision (amongst others). #CMSPaper 1363 describes how those protons are reconstructed, identified and measured exactly. https://buff.ly/3ZpPEgG
More than 99% top quarks decay to a W boson+bottom quark. This #CMSPaper checks top quark decays to Higgs boson+light quark. The standard model predicts that's super-rare, but many new physics models predict it happens more. We measure it as less than 0.056% of top quarks.
arxiv.org/abs/2407.15172
arxiv.org/abs/2407.15172
June 26, 2025 at 12:04 PM
More than 99% top quarks decay to a W boson+bottom quark. This #CMSPaper checks top quark decays to Higgs boson+light quark. The standard model predicts that's super-rare, but many new physics models predict it happens more. We measure it as less than 0.056% of top quarks.
arxiv.org/abs/2407.15172
arxiv.org/abs/2407.15172
The W and Z bosons, discovered in 1983, are essential for studying the weak force. CMSPaper 1365 examines simultaneous production of a W and Z boson to test their interactions. Results are compared to the best calculations available, showing only a few percent uncertainty https://buff.ly/3Vx8CAN
February 3, 2025 at 1:03 PM
The W and Z bosons, discovered in 1983, are essential for studying the weak force. CMSPaper 1365 examines simultaneous production of a W and Z boson to test their interactions. Results are compared to the best calculations available, showing only a few percent uncertainty https://buff.ly/3Vx8CAN
Long awaited: LHCb has seen discrepancies for years in the angular distributions of B→Kμμ signatures (so in transitions of bottom to strange quarks) that definitely do not agree with the prediction. #CMSPaper 1360 now confirms the LHCb measurements https://buff.ly/3OnJSHe
December 12, 2024 at 1:03 PM
Long awaited: LHCb has seen discrepancies for years in the angular distributions of B→Kμμ signatures (so in transitions of bottom to strange quarks) that definitely do not agree with the prediction. #CMSPaper 1360 now confirms the LHCb measurements https://buff.ly/3OnJSHe
Can light bounce off light? CMSPaper 1369 shows it can, and that means we can measure the fundamental interactions of quantum-electrodynamics. And see if there is something extra, so this result also limits what axion-like-particle scenarios are possible buff.ly/3PPU7EP
March 2, 2025 at 1:03 PM
Can light bounce off light? CMSPaper 1369 shows it can, and that means we can measure the fundamental interactions of quantum-electrodynamics. And see if there is something extra, so this result also limits what axion-like-particle scenarios are possible buff.ly/3PPU7EP
#CMSPaper 1366 examines a large sample of particle jets for behaviour inconsistent with the standard model, using ambitious unsupervised, weakly supervised and semi-supervised #machinelearning methods. They were usually more sensitive than 'classic' particle physics methods https://buff.ly/3CZwpmr
December 15, 2024 at 1:03 PM
#CMSPaper 1366 examines a large sample of particle jets for behaviour inconsistent with the standard model, using ambitious unsupervised, weakly supervised and semi-supervised #machinelearning methods. They were usually more sensitive than 'classic' particle physics methods https://buff.ly/3CZwpmr
#CMSPaper 1359 examines a problem we have when simulating LHC collisions: modeling the theoretical assumptions made by the simulation correctly and without having to re-run the simulation many, many times. This paper shows #machinelearning solutions to that problem https://buff.ly/3CjdrXK
December 2, 2024 at 6:22 PM
#CMSPaper 1359 examines a problem we have when simulating LHC collisions: modeling the theoretical assumptions made by the simulation correctly and without having to re-run the simulation many, many times. This paper shows #machinelearning solutions to that problem https://buff.ly/3CjdrXK
This #CMSpaper looks again at a non-significant (but intriguing!) excess in signatures consistent with two unstable, unknown particles from a heavier source. This paper further compares to theory predictions explaining these four-jet events
arxiv.org/abs/2507.17884
arxiv.org/abs/2507.17884
August 9, 2025 at 12:03 PM
This #CMSpaper looks again at a non-significant (but intriguing!) excess in signatures consistent with two unstable, unknown particles from a heavier source. This paper further compares to theory predictions explaining these four-jet events
arxiv.org/abs/2507.17884
arxiv.org/abs/2507.17884
Another 2024 highlight #CMSPaper is the ATLAS and CMS of the top quark mass, using the data collected in LHC Run 1. The uncertainty of the combination is 1.9 permille! Knowing the mass accurately helps with precision standard model predictions for other particles buff.ly/4cSnRdU
December 30, 2024 at 6:22 PM
Another 2024 highlight #CMSPaper is the ATLAS and CMS of the top quark mass, using the data collected in LHC Run 1. The uncertainty of the combination is 1.9 permille! Knowing the mass accurately helps with precision standard model predictions for other particles buff.ly/4cSnRdU
Another 2024 highlight #CMSPaper is the ATLAS and CMS of the top quark mass, using the data collected in LHC Run 1. The uncertainty of the combination is 1.9 permille! Knowing the mass accurately helps with precision standard model predictions for other particles buff.ly/4cSnRdU
December 26, 2024 at 1:03 PM
Another 2024 highlight #CMSPaper is the ATLAS and CMS of the top quark mass, using the data collected in LHC Run 1. The uncertainty of the combination is 1.9 permille! Knowing the mass accurately helps with precision standard model predictions for other particles buff.ly/4cSnRdU
This #CMSpaper looks again at a non-significant (but intriguing!) excess in signatures consistent with two unstable, unknown particles from a heavier source. This paper further compares to theory predictions explaining these four-jet events
arxiv.org/abs/2507.17884
arxiv.org/abs/2507.17884
November 9, 2025 at 1:03 PM
This #CMSpaper looks again at a non-significant (but intriguing!) excess in signatures consistent with two unstable, unknown particles from a heavier source. This paper further compares to theory predictions explaining these four-jet events
arxiv.org/abs/2507.17884
arxiv.org/abs/2507.17884
Can light bounce off light? #CMSPaper 1369 shows it can, and that means we can measure the fundamental interactions of quantum-electrodynamics. And see if there is something extra, so this result also limits what axion-like-particle scenarios are possible https://buff.ly/3PPU7EP
January 28, 2025 at 1:03 PM
Can light bounce off light? #CMSPaper 1369 shows it can, and that means we can measure the fundamental interactions of quantum-electrodynamics. And see if there is something extra, so this result also limits what axion-like-particle scenarios are possible https://buff.ly/3PPU7EP
The study of CP violation, or the difference in behaviour between composite matter and antimatter particles, is a very active field of study of the LHC. #CMSPaper 1374 studies CP oscillation (check that sinus!) in the B meson decay in signatures with two muons and two kaons arxiv.org/abs/2412.19952
March 16, 2025 at 1:03 PM
The study of CP violation, or the difference in behaviour between composite matter and antimatter particles, is a very active field of study of the LHC. #CMSPaper 1374 studies CP oscillation (check that sinus!) in the B meson decay in signatures with two muons and two kaons arxiv.org/abs/2412.19952
#CMSpaper: Search for the rare decay D⁰ → μ⁺μ⁻ in proton-proton collisions at √s = 13.6 TeV (arXiv:2506.06152) https://arxiv.org/abs/2506.06152 #BPhysics
June 16, 2025 at 6:03 PM
#CMSpaper: Search for the rare decay D⁰ → μ⁺μ⁻ in proton-proton collisions at √s = 13.6 TeV (arXiv:2506.06152) https://arxiv.org/abs/2506.06152 #BPhysics
Another high-profile 2024 #CMSPaper Other experiments see differences between leptons in some particle decays. So we also checked this for B mesons to Kaons + leptons, measured as R(K). The findings agree with the standard model and other results (first try, big errors still) https://buff.ly/3x52AhC
December 29, 2024 at 6:22 PM
Another high-profile 2024 #CMSPaper Other experiments see differences between leptons in some particle decays. So we also checked this for B mesons to Kaons + leptons, measured as R(K). The findings agree with the standard model and other results (first try, big errors still) https://buff.ly/3x52AhC