CERN Accelerating science

CERN Preprints

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2022-08-19
17:15
Rare Higgs decays, Higgs BSM and HH in ATLAS and CMS / Gennai, Simone (INFN, Milan Bicocca) /ATLAS, CMS and Higgs collaborations
The Higgs boson discovery signed a fundamental step in our comprehension of the Standard Model of elementary particles. Since then the ATLAS and CMS collaborations moved their focus from a discovery strategy to the study of the properties of the new boson also looking for possible hints of new physics. [...]
CMS-CR-2022-077.- Geneva : CERN, 2022 - 7 p. Fulltext: PDF;
In : XXXV Rencontres de Physique de La Vallée d'Asoste, La Thuile, It, 6 - 12 Mar 2022

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2022-08-19
09:52
Study of $B_c^+$ meson decays to charmonia plus multihadron final states
Four decay modes of the $B_c^+$ meson into a $J/\psi$~meson and multiple charged kaons or pions are studied using proton-proton collision data, collected with the LHCb detector at centre-of-mass energies of 7, 8, and 13 TeV and corresponding to an integrated luminosity of $9$fb$^{-1}$.The decay $B_c^+\to J/\psi K^+ K^- \pi^+ \pi^+ \pi^-$ is observed for the first time, and evidence for the $B_c^+\to J/\psi 4\pi^+ 3\pi^-$ decay is found. [...]
arXiv:2208.08660 ; CERN-EP-2022-162 ; LHCB-PAPER-2022-025.
- 2022.
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2022-08-18
12:13
Model-independent measurement of charm mixing parameters in $\bar{B} \rightarrow D^0 ( \rightarrow K_S^0 \pi^+ \pi^-) \mu^- \bar{\nu}_\mu X$
A measurement of charm mixing and $CP$-violating parameters is reported, using $\bar{B} \rightarrow D^0 ( \rightarrow K_S^0 \pi^+ \pi^-) \mu^-\bar{\nu}_\mu X$ decays reconstructed in proton-proton collisions collected by the LHCb experiment during the years 2016 to 2018, corresponding to an integrated luminosity of 5.4 fb$^{-1}$. [...]
arXiv:2208.06512 ; CERN-EP-2022-160 ; LHCB-PAPER-2022-020.
- 2022.
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2022-08-18
04:36
Opportunities with ultra-soft photons: Bremsstrahlung from stopping / Park, Sohyun (CERN)
We compute the spectra of bremsstrahlung photons for different stopping scenarios which give rise to different initial charge-rapidity distributions. [...]
arXiv:2208.01527.
- 6 p.
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2022-08-17
07:49
Simulated Detector Performance at the Muon Collider / Muon Collider Collaboration
In this paper we report on the current status of studies on the expected performance for a detector designed to operate in a muon collider environment. [...]
arXiv:2203.07964 ; FERMILAB-FN-1185-AD-ND-PPD-TD.
- 45 p.
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2022-08-17
07:47
Heavy-ion physics with the ALICE detector / Miskowiec, Dariusz
Selection of recent (in March 2022) results from the heavy-ion experiment ALICE at the CERN LHC, chosen to address various stages of the nucleus-nucleus reaction..
arXiv:2208.05290.
- 8 p.
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2022-08-17
07:43
Decomposition, condensation defects, and fusion / Lin, L. (CERN) ; Robbins, D. (SUNY, Albany) ; Sharpe, E. (Virginia Tech.)
In this paper we outline the application of decomposition to condensation defects and their fusion rules. [...]
arXiv:2208.05982 ; CERN-TH-2022-128.
- 47 p.
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2022-08-17
07:41
Top quark mass and properties in ATLAS and CMS / Wuchterl, Sebastian (DESY)
For standard model (SM) processes involving top quarks, such as top quark-antiquark pair production or single top quark production, the theoretical predictions depend on fundamental parameters of the SM like the top quark mass. [...]
arXiv:2208.07153.
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2022-08-17
04:16
AEgIS: Status and Prospects / Caravita, Ruggero
The progresses of the AEgIS collaboration on its way towards directly measuring the gravitational free-fall of neutral antimatter atoms are reviewed. [...]
arXiv:2208.07050.
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2022-08-17
04:16
Field-dependent surface resistance for superconducting niobium accelerating cavities-condensed overview / Weingarten, Wolfgang (CERN)
Small (compared to coherence length) weak superconducting defects when located at the surface, combined with the proximity and percolation effects, are claimed responsible for various observations with superconducting rf accelerating cavities with non-constant Q-value..
arXiv:2207.12873.
- 9 p.
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