CERN Preprints

Πρόσφατες προσθήκες:
2020-08-06
15:37
 Combination of the ATLAS, CMS and LHCb results on the $B^0_{(s)} \to \mu^+ \mu^-$ decays /LHCb Collaboration A combination of results on the rare $B^0_{s} \to \mu^+ \mu^-$ and $B^0 \to \mu^+ \mu^-$ decays from the ATLAS, CMS, and LHCb experiments using data collected at the Large Hadron Collider between 2011 and 2016, is presented. The $B^0_{s} \to \mu^+ \mu^-$ branching fraction is obtained to be $\left( 2.69\,^{+\, 0.37}_{-\, 0.35} \right) \times 10^{-9}$ and the effective lifetime of the $B^0_{s} \to \mu^+ \mu^-$ decay is measured to be $\tau_{B^0_{s} \to \mu^+ \mu^-} = 1.91^{+0.37}_{-0.35} \rm{ps}$. [...] LHCb-CONF-2020-002; CERN-LHCb-CONF-2020-002.- Geneva : CERN, 2020 - 11. Fulltext: LHCb-CONF-2020-002-figures - ZIP; LHCb-CONF-2020-002 - PDF; In : 40th International Conference on High Energy Physics, Prague, Czech Republic, 28 Jul - 6 Aug 2020

2020-08-06
05:53
 Combining single and double parton scatterings in a parton shower / Cabouat, Baptiste ; Gaunt, Jonathan R. Double parton scattering (DPS) processes in which there is a perturbative \mbox{$1\to2$''} splitting in both protons overlap with loop corrections to single parton scattering (SPS). [...] arXiv:2008.01442 ; MAN/HEP/2020/007 ; CERN-TH-2020-114 ; MCnet-20-18. - 46 p. Fulltext

2020-08-06
05:53
 Global Electroweak Fit and Vector-Like Leptons in Light of the Cabibbo Angle Anomaly / Crivellin, Andreas ; Kirk, Fiona ; Manzari, Claudio Andrea ; Montull, Marc The "Cabibbo Angle Anomaly'' (CAA) originates from the disagreement between the CKM elements $V_{ud}$ and $V_{us}$ extracted from superallowed beta and kaon decays, respectively, once compared via CKM unitarity. [...] arXiv:2008.01113 ; CERN-TH-2020-128 ; PSI-PR-20-11 ; UZ-TH 26/20. - 34 p. Fulltext

2020-08-04
17:05
 Measurement of the CKM angle $\gamma$ in $B^\pm\to D K^\pm$ and $B^\pm \to D \pi^\pm$ decays with $D \to K_\mathrm S^0 h^\pm h^\mp$ /LHCb Collaboration A measurement of $CP$-violating observables is performed using the decays ${B^\pm \to D K^\pm}$ and ${B^\pm \to D \pi^\pm}$, where the $D$ meson is reconstructed in one of the self-conjugate three-body final states $K_\mathrm S^0\pi^+\pi^-$ and $K_\mathrm S^0 K^+ K^-$ ($h^\pm h^\mp = \pi^\pm \pi^\mp, K^\pm K^\mp$). The decays are analysed in bins of the $D$-decay phase space, leading to a measurement that is independent of the modelling of the $D$-decay amplitude. [...] LHCb-CONF-2020-001; CERN-LHCb-CONF-2020-001.- Geneva : CERN, 2020 - 24. Fulltext: figures - ZIP; LHCb-CONF-2020-001 - PDF; In : 40th International Conference on High Energy Physics, Prague, Czech Republic, 28 Jul - 6 Aug 2020

2020-08-04
06:57
 Dynamic Ferromagnetic Hysteresis Modelling Using a Preisach-Recurrent Neural Network Model / Grech, Christian (Malta U. ; CERN) ; Buzio, Marco (CERN) ; Pentella, Mariano (CERN ; Polytech. Turin) ; Sammut, Nicholas (Malta U. ; CERN) 2020.

2020-08-04
06:57
 Physics at the high-luminosity LHC / Meyer, Andreas B (DESY) The High-Luminosity LHC (HL-LHC) is scheduled to start operation in 2027. [...] INFN Frascati, 2019. - 6 p.

2020-08-04
04:15
 Muon Colliders: Opening New Horizons for Particle Physics / Long, Kenneth (Imperial Coll., London) ; Lucchesi, Donatella (Padua U. ; INFN, Padua) ; Palmer, Mark (Brookhaven) ; Pastrone, Nadia (INFN, Turin) ; Schulte, Daniel (CERN) ; Shiltsev, Vladimir (Fermilab) Particle colliders have arguably been the most important instruments for particle physics over the past 50 years. [...] arXiv:2007.15684. - 12 p. Fulltext

2020-08-04
04:15
 Reconstruction and identification of boosted di-$\tau$ systems in a search for Higgs boson pairs using 13 TeV proton$-$proton collision data in ATLAS / ATLAS Collaboration In this paper, a novel technique, referred to as the di-$\tau$ tagger, is designed to reconstruct and identify hadronically decaying $\tau^+\tau^-$ pairs with a large Lorentz boost in the ATLAS experiment at the Large Hadron Collider. [...] arXiv:2007.14811 ; CERN Preprint ID: CERN-EP-2020-118. - 45 p. Fulltext

2020-08-04
04:15
 The determination of the spin and parity of a vector-vector system / Mikhasenko, Mikhail (CERN) ; An, Liupan (INFN, Florence) ; McNulty, Ronan (University Coll., Dublin) We present a construction of the reaction amplitude for the inclusive production of a resonance decaying to a pair of identical vector particles such as $J/\psi J/\psi$, $\rho\rho$, $\phi\phi$, or $ZZ$. [...] arXiv:2007.05501. - 8 p. Fulltext

2020-08-01
05:54
 Updated predictions for gravitational waves produced in a strongly supercooled phase transition / Ellis, John ; Lewicki, Marek ; Vaskonen, Ville We update predictions for the gravitational wave (GW) signal from a strongly supercooled phase transition in an illustrative classically conformal U(1)$_{B-L}$ model. [...] arXiv:2007.15586 ; KCL-PH-TH/2020-40 ; CERN-TH-2020-129. - 22 p. Fulltext