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2024-09-09
14:28
First determination of the spin-parity of ${\Xi}_{c}(3055)^{+0}$ baryons
The ${{\Xi}_{b}^{0(-)}\to{\Xi}_{c}(3055)^{+(0)}(\to D^{+(0)}{\Lambda}){\pi}^{-}}$ decay chains are observed, and the spin-parity of ${\Xi}_{c}(3055)^{+(0)}$ baryons is determined for the first time. [...]
CERN-EP-2024-215 ; LHCB-PAPER-2024-018. - 2024.
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2024-09-09
11:52
Higgs boson cross section and coupling measurements at CMS / Jan Lukas Spah /CMS Collaboration
This report discusses recent measurements of the couplings of the Higgs boson, as well as its inclusive and fiducial production cross sections, by the CMS experiment with data collected at the centre-of-mass energies of $13~\mathrm{TeV}$ and $13.6~\mathrm{TeV}$. The proceeding presents searches for $W^{\pm}H(b\overline{b})$ and $W^{\pm}W^{\pm}H(b\overline{b})$ production through vector-boson scattering and the measurement of $t\overline{t}H(b\overline{b})$ as well as the search for $tH(b\overline{b})$ production using $138~\mathrm{fb}^{-1}$ of data collected at $\sqrt{s} = 13~\mathrm{TeV}$. Additionally, the measurements of Higgs boson production in the four-lepton and diphoton final states with data taken in 2022 at $\sqrt{s} = 13.6~\mathrm{TeV}$, corresponding to $34.7~\mathrm{fb}^{-1}$, are discussed. The results agree with the standard model predictions..
CMS-CR-2024-172.- Geneva : CERN, 2024 - 7 p. Fulltext: PDF;
In : 42nd International Conference on High Energy Physics (ICHEP 2024), Prague, Czech Republic, 18 - 24 Jul 2024

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2024-09-09
11:52
Experimental overview of BSM searches (including resonant HH production) / Soffi, Livia (INFN, Rome) /ATLAS, CMS and LHCB Collaborations
This document summarizes recent results from ATLAS and CMS collaborations in searches for physics Beyond the Standard Model (BSM) using data from LHC Runs 2 and 3. It focuses on key BSM scenarios, including extended Higgs sectors, supersymmetry, heavy fermions, and the two-Higgs-doublet model with an additional pseudoscalar. [...]
CMS-CR-2024-169.- Geneva : CERN, 2024 - 14 p. Fulltext: PDF;
In : 42nd International Conference on High Energy Physics (ICHEP 2024), Prague, Czech Republic, 18 - 24 Jul 2024

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2024-09-09
11:52
Quality Control of LYSO Ce crystals for the CMS barrel MIP Timing Detector / Gargiulo, Ruben (INFN, Rome ; Rome U.) /CMS Collaboration
In the next years, the Large Hadron Collider will enter its High-Luminosity (HL-LHC) phase. Many CMS subsystems will be upgraded to maintain the current physics performance, despite the higher levels of pileup and radiation. [...]
CMS-CR-2024-103.- Geneva : CERN, 2024 - 3 p. Fulltext: PDF;
In : 16th Pisa Meeting on Advanced Detectors, La Biodola, Isola D'elba, Italy, 26 May - 1 Jun 2024

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2024-09-09
11:49
Precision timing calorimetry with the CMS High Granularity Calorimeter / Lobanov, Artur (Hamburg U.) /CMS Collaboration
The existing CMS endcap calorimeters will be replaced with a High Granularity Calorimeter (HGCAL) for operation at the High Luminosity (HL) LHC. Radiation hardness and excellent physics performance will be achieved by utilising silicon pad sensors and SiPM-on-scintillator tiles with high longitudinal and transverse segmentation. [...]
CMS-CR-2020-065.- Geneva : CERN, 2020 - 8 p. Fulltext: PDF;
In : 3rd Conference on Calorimetry for the High Energy Frontier, Fukuoka, Japan, 25 - 29 Nov 2019

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2024-09-09
10:21
Measurement of exclusive $J/\psi$ and $\psi(2S)$ production at $\sqrt{s}=13$ TeV / LHCb Collaboration
Measurements are presented of the cross-section for the central exclusive production of $J/\psi\to\mu^+\mu^-$ and $\psi(2S)\to\mu^+\mu^-$ processes in proton-proton collisions at $\sqrt{s} = 13 $ TeV with 2016-2018 data. [...]
arXiv:2409.03496 ; LHCb-PAPER-2024-012 ; CERN-EP-2024-213 ; LHCB-PAPER-2024-012. - 2024. - 36 p.
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2024-09-07
04:58
Ionization potential of radium monofluoride / Wilkins, S.G. (MIT) ; Perrett, H.A. (Manchester U.) ; Udrescu, S.M. (MIT) ; Kyuberis, A.A. (U. Groningen, VSI) ; Pašteka, L.F. (U. Groningen, VSI ; Comenius U.) ; Au, M. (CERN ; Mainz U.) ; Belošević, I. (MIT ; TRIUMF) ; Berger, R. (Philipps U. Marburg) ; Binnersley, C.L. (Manchester U.) ; Bissell, M.L. (Manchester U.) et al.
The ionization potential (IP) of radium monofluoride (RaF) was measured to be 4.969(2)[10] eV, revealing a relativistic enhancement in the series of alkaline earth monofluorides. [...]
arXiv:2408.14673. - 10 p.
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2024-09-07
04:55
Polarized and un-polarized $\mathcal{R}_{K^*}$ in and beyond the SM / Ahmed, Ishtiaq (COMSATS, Islamabad ; CERN) ; Shafaq, Saba (Int. Islamic U., Islamabad) ; Aslam, M. Jamil (Quaid-i-Azam U.) ; Ishaq, Saadi (NUST, Islamabad)
The Standard Model (SM) is lepton flavor universal, and the recent measurements of lepton flavor universality in $B \to (K,K^*)\ell^{+}\ell^{-}$, for $\ell = \mu, \; e$, decays now lie close to the SM predictions. [...]
CERN-TH-2024-148 ; arXiv:2409.03388. - 18 p.
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2024-09-06
14:06
Measurement of $CP$ violation in $B^0 \to D^+D^-$ and $B_s^0 \to D_s^+D_s^-$ decays / LHCb Collaboration
A time-dependent, flavour-tagged measurement of $CP$ violation is performed with ${B^0}\rightarrow{D^{+}D^{-}}$ and ${B^{0}_{s}}\rightarrow{D^{+}_{s}D^{-}_{s}}$ decays, using data collected by the LHCb detector in proton-proton collisions at a centre-of-mass energy of 13 TeV corresponding to an integrated luminosity of 6 fb$^{-1}$. [...]
arXiv:2409.03009 ; LHCb-PAPER-2024-027 ; CERN-EP-2024-217 ; LHCB-PAPER-2024-027. - 2024. - 26 p.
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2024-09-06
12:25
Measurement of $\Lambda_b^0$, $\Lambda_c^+$ and $\Lambda$ decay parameters using $\Lambda_b^0 \to \Lambda_c^+h^-$ decays / LHCb Collaboration
A comprehensive study of the angular distributions in the bottom-baryon decays $\it{\Lambda}^\mathrm{0}_b\to\it{\Lambda}_c^+ h^-(h=\pi, K)$, followed by $\it{\Lambda}_c^+\to\it{\Lambda} h^+$ with $\it{\Lambda}\to \it{p} \pi^-$ or $\it{\Lambda}_c^+\to\it{p}\it{K}^0_\mathrm{S}$ decays, is performed using a data sample of proton-proton collisions corresponding to an integrated luminosity of 9 $\mathrm{fb}^{-1}$ collected by the LHCb experiment at center-of-mass energies of 7, 8 and 13 $\mathrm{Te\kern -0.1em V}$. [...]
arXiv:2409.02759 ; LHCb-PAPER-2024-017 ; CERN-EP-2024-200. - 2024. - 34 p, 34 p.
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