CERN Accelerating science

CERN Document Server Znaleziono 477 rekordów  1 - 10następnykoniec  skocz do rekordu: Szukanie trwało 0.68 sekund. 
1.
Measurement of the fractional radiation length of a pixel module for the CMS Phase-2 upgrade via the multiple scattering of positrons / Tracker Group of the CMS Collaboration
High-luminosity particle collider experiments such as the ones planned at the High-Luminosity Large Hadron Collider require ever-greater vertexing precision of the tracking detectors, necessitating also reductions in the material budget of the detectors. Traditionally, the fractional radiation length ($x/X_0$) of detectors is either estimated using known properties of the constituent materials, or measured in dedicated runs of the final detector. [...]
arXiv:2407.13721; CERN-CMS-NOTE-2024-005.- Geneva : CERN, 2024-10-16 - 42 p. - Published in : JINST 19 (2024) P10023 Fulltext: NOTE2024_005 - PDF; 2407.13721 - PDF; cc31400e03af7929e4432fc48d857519 - PDF; Fulltext from Publisher: PDF; External link: Fermilab Library Server
2.
Beam Test Performance Studies of CMS Phase-2 Outer Tracker Module Prototypes / Tracker Group of the CMS Collaboration
A new tracking detector will be installed as part of the Phase-2 upgrade of the CMS detector for the high-luminosity LHC era. This tracking detector includes the Inner Tracker, equipped with silicon pixel sensor modules, and the Outer Tracker, consisting of modules with two parallel stacked silicon sensors. [...]
arXiv:2404.08794.- 2024-10-30 - 40 p. - Published in : JINST 19 (2024) P10032 Fulltext: PDF; Fulltext from Publisher: PDF;
3.
Evidence for the Higgs boson decay to a $Z$ boson and a photon at the LHC / ATLAS Collaboration
The first evidence for the Higgs boson decay to a $Z$ boson and a photon is presented, with a statistical significance of 3.4 standard deviations. The result is derived from a combined analysis of the searches performed by the ATLAS and CMS Collaborations with proton-proton collision data sets collected at the CERN Large Hadron Collider (LHC) from 2015 to 2018. [...]
arXiv:2309.03501; CERN-EP-2023-157; CMS-HIG-23-002.- Geneva : CERN, 2024-01-11 - 32 p. - Published in : Phys. Rev. Lett. 132 (2024) 021803 Fulltext: 2309.03501 - PDF; fb04f556ba10912b08405b9ca563b99a - PDF; Fulltext from Publisher: PDF; External links: Physics Synopsis; Fermilab Library Server
4.
Evaluation of planar silicon pixel sensors with the RD53A readout chip for the Phase-2 Upgrade of the CMS Inner Tracker / CMS Collaboration
The Large Hadron Collider (LHC) at CERN will undergo an upgrade in order to increase its luminosity to $7.5 \times 10^{34}$ cm$^{-2}$s$^{-1}$. The increased luminosity during this High-Luminosity running phase\\ (HL-LHC), starting around 2029, means a higher rate of proton-proton interactions, hence a larger ionizing dose and particle fluence for the detectors. The current tracking system of the CMS experiment will be fully replaced in order to cope with the new operating conditions. [...]
arXiv:2307.01580; CERN-CMS-NOTE-2023-005.- Geneva : CERN, 2023-11-17 - 29 p. - Published in : JINST 18 (2023) P11015 Fulltext: NOTE2023_005 - PDF; 2307.01580 - PDF; dc1e9cca1e7c6f6dae97cbda67121cb1 - PDF; Fulltext from Publisher: PDF; External link: Fermilab Library Server
5.
Evaluation of HPK $n^+$-$p$ planar pixel sensors for the CMS Phase-2 upgrade / Tracker Group of the CMS Collaboration
To cope with the challenging environment of the planned high luminosity upgrade of the Large Hadron Collider (HL-LHC), scheduled to start operation in 2029, CMS will replace its entire tracking system. The requirements for the tracker are largely determined by the long operation time of 10~years with an instantaneous peak luminosity of up to $7.5\times 10^{34}$~cm$^{-2}$s$^{-1}$ in the ultimate performance scenario. Depending on the radial distance from the interaction point, the silicon sensors will receive a particle fluence corresponding to a non-ionizing energy loss of up to $\Phi_{\text{eq}} = 3.5\times 10^{16}$~cm$^{-2}$. [...]
arXiv:2212.04793; CMS-NOTE-2023-002.- Geneva : CERN, 2023-05-09 - 18 p. - Published in : Nucl. Instrum. Methods Phys. Res., A 1053 (2023) 168326 Fulltext: NOTE2023_002 - PDF; 2212.04793 - PDF; 826201a370cac8eb0cb4bd0a37aa14d9 - PDF; External link: Fermilab Library Server
6.
The ESO’s Extremely Large Telescope Working Groups / Padovani, Paolo (European Southern Observ. ; Rome Observ.) ; Cirasuolo, Michele (European Southern Observ. ; Rome Observ.) ; van der Burg, Remco (European Southern Observ. ; Rome Observ.) ; Cantalloube, Faustine (Marseille, Lab. Astrophys.) ; George, Elizabeth (European Southern Observ. ; Rome Observ.) ; Kasper, Markus (European Southern Observ. ; Rome Observ.) ; Leschinski, Kieran (U. Vienna (main)) ; Martins, Carlos (Porto U.) ; Milli, Julien (IPAG) ; Möhler, Sabine (European Southern Observ. ; Rome Observ.) et al.
Since 2005 ESO has been working with its community and industry to develop an extremely large optical/infrared telescope. ESO’s Extremely Large Telescope, or ELT for short, is a revolutionary ground-based telescope that will have a 39-metre main mirror and will be the largest visible and infrared light telescope in the world. [...]
2022 - 8 p. - Published in : The Messenger 189 (2022) 23-30 Fulltext: PDF;
7.
Search for a vector-like quark T' $ \to $ tH via the diphoton decay mode of the Higgs boson in proton-proton collisions at $ \sqrt{s}= $ 13 TeV / CMS Collaboration
A search for the electroweak production of a vector-like quark T', decaying to a top quark and a Higgs boson is presented. The search is based on a sample of proton-proton collision events recorded at the LHC at $ \sqrt{s}= $ 13 TeV, corresponding to an integrated luminosity of 138 fb$ ^{-1} $. [...]
arXiv:2302.12802; CMS-B2G-21-007; CERN-EP-2022-253; CMS-B2G-21-007-003.- Geneva : CERN, 2023-09-11 - 17 p. - Published in : JHEP 2309 (2023) 057 Fulltext: 2302.12802 - PDF; 4a26a17b31db3dceac6ce7256986f0fb - PDF; Fulltext from Publisher: PDF; External link: Fermilab Library Server
8.
Measurement of the top quark mass using a profile likelihood approach with the lepton + jets final states in proton–proton collisions at $\sqrt{s}=13\,\text {Te}\hspace{-.08em}\text {V} $ / CMS Collaboration
The mass of the top quark is measured in 36.3 fb$ ^{-1} $ of LHC proton-proton collision data collected with the CMS detector at $ \sqrt{s}= $ 13 TeV. The measurement uses a sample of top quark pair candidate events containing one isolated electron or muon and at least four jets in the final state. [...]
arXiv:2302.01967; CMS-TOP-20-008; CERN-EP-2022-245; CMS-TOP-20-008-006.- Geneva : CERN, 2023-10-25 - 31 p. - Published in : Eur. Phys. J. C 83 (2023) 963 Fulltext: 2302.01967 - PDF; f6f9f1e603c3037016f24ce8d9cd443e - PDF; Fulltext from Publisher: PDF; External link: Fermilab Library Server
9.
Test beam performance of a CBC3-based mini-module for the Phase-2 CMS Outer Tracker before and after neutron irradiation / Tracker Group of the CMS Collaboration
The Large Hadron Collider (LHC) at CERN will undergo major upgrades to increase the instantaneous luminosity up to 5-7.5$\times10^{34}$ cm$^{-2}$s$^{-1}$. This High Luminosity upgrade of the LHC (HL-LHC) will deliver a total of 3000-4000 fb$^{-1}$ of proton-proton collisions at a center-of-mass energy of 13-14 TeV. [...]
arXiv:2205.00961.- 2023-04-04 - 31 p. - Published in : JINST 18 (2023) P04001 Fulltext: jt - PDF; FERMILAB-PUB-22-355-CMS-PPD-SCD - PDF; 2205.00961 - PDF; Fulltext from Publisher: PDF; External link: Fermilab Library Server
10.
Search for top squarks in the four-body decay mode with single lepton final states in proton-proton collisions at $ \sqrt{s}= $ 13 TeV / CMS Collaboration
A search for the pair production of the lightest supersymmetric partner of the top quark, the top squark ($ \tilde{\mathrm{t}}_{1} $), is presented. The search targets the four-body decay of the $ \tilde{\mathrm{t}}_{1} $, which is preferred when the mass difference between the top squark and the lightest supersymmetric particle is smaller than the mass of the W boson. [...]
arXiv:2301.08096; CMS-SUS-21-003; CERN-EP-2022-254; CMS-SUS-21-003-003.- Geneva : CERN, 2023-06-12 - 26 p. - Published in : JHEP 2306 (2023) 060 Fulltext: 2efff2d7c2cb5b21e93ffecdfc3c1f52 - PDF; 2301.08096 - PDF; CMS-SUS-21-003-arXiv - PDF; Fulltext from Publisher: PDF; External link: Fermilab Library Server

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