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CERN Document Server 2,049 records found  1 - 10nextend  jump to record: Search took 0.70 seconds. 
1.
(100)
CP violation and determination of the $bs$ "flat" unitarity triangle at FCCee / Aleksan, Roy (IRFU, Saclay) ; Oliver, L. (IJCLab, Orsay) ; Perez, Emmanuel (CERN)
We investigate the sensitivity with which two angles of the "flat" unitarity triangle, defined by $V_{ub}^* V_{us} + V_{cb}^* V_{cs} + V_{tb}^* V_{ts} =0$, can possibly be measured directly at FCCee. We show that the measured errors on the angle $\alpha_s = \arg(- V_{ub}^* V_{us} /V_{tb}^* V_{ts})$ and $\beta_s = \arg(-V_{tb}^* V_{ts} / V_{cb}^* V_{cs})$ should be better than $0.4^\circ$ and $0.035^\circ$, respectively. [...]
arXiv:2107.02002.- 2022-03-01 - 27 p. - Published in : Phys. Rev. D 105 (2022) 053008 Fulltext: PDF; Fulltext from publisher: PDF;
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2.
(91)
Measurement of two particle pseudorapidity correlations in Pb+Pb collisions at $\sqrt{s_{NN}}$ = 2.76 TeV with the ATLAS detector / Radhakrishnan, Sooraj (SUNY, Stony Brook) /for the ATLAS Collaboration
Two-particle pseudorapidity correlations, measured using charged particles with $p_{\mathrm{T}} >$ 0.5 GeV and $|\eta| <$ 2.4, from $\sqrt{s_{NN}}$ = 2.76 TeV Pb+Pb collisions collected in 2010 by the ATLAS experiment at the LHC are presented. The correlation function $C_N(\eta_1,\eta_2)$ is measured for different centrality intervals as a function of the pseudorapidity of the two particles, $\eta_1$ and $\eta_2$. [...]
arXiv:1511.00361.- 2016-06-08 - 4 p. - Published in : Nucl. Part. Phys. Proc. 276-278 (2016) 121-124 Fulltext: arXiv:1511.00361 - PDF; 1511.00361 - PDF; External link: Preprint
In : 7th International Conference on Hard and Electromagnetic Probes of High-Energy Nuclear Collisions, Montreal, Québec, Canada, 29 Jun - 3 Jul 2015, pp.121-124
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3.
(87)
Discovering true tauonium via two-photon fusion at $e^+e^-$ and hadron colliders / d'Enterria, David (CERN) ; Shao, Hua-Sheng (Paris, LPTHE)
The feasibility of observing true tauonium, the bound state of two tau leptons, $\mathcal{T}_0\equiv(\tau^+\tau^-)_0$, via photon-photon collisions at $e^+e^-$ colliders and at the LHC, is studied. The production cross sections of the process $\gamma\gamma\to\mathcal{T}_0\to\gamma\gamma$-- as well as those of all relevant backgrounds: spin-0 and 2 charmonium resonances decaying to diphotons, and light-by-light scattering -- are computed in the equivalent photon approximation for $e^+e^-$ collisions at BES III ($\sqrt{s} = 3.8$ GeV), Belle II ($\sqrt{s} = 10.6$ GeV), and FCC-ee ($\sqrt{s} = 91.2$ GeV), as well as for ultraperipheral p-p, p-Pb, and Pb-Pb collisions at the LHC. [...]
arXiv:2202.02316.- 2022-05-01 - 9 p. - Published in : Phys. Rev. D 105 (2022) 093008 Fulltext: PDF;
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4.
(86)
Open charm tetraquarks in broken SU(3)_F symmetry / Maiani, L. (Rome U. ; CERN) ; Polosa, A.D. (Rome U.) ; Riquer, V. (Rome U. ; CERN)
Prompted by a recent lattice QCD calculation, we review the SU(3) light quark flavor structure of charmed tetraquarks with spin-0 diquarks. Fermi statistics forces the three light quarks to be in the representation 3*x3*= 3+6*. [...]
arXiv:2405.08545.- 2024-08-01 - 6 p. - Published in : Phys. Rev. D 110 (2024) 034014 Fulltext: Publication - PDF; 2405.08545 - PDF;
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5.
(81)
Beyond the standard model effective field theory with $B \rightarrow c \tau^- \overline{\nu}$ / Burgess, C.P. (McMaster U. ; Perimeter Inst. Theor. Phys. ; CERN) ; Hamoudou, Serge (Montreal U.) ; Kumar, Jacky (Montreal U. ; TUM-IAS, Munich) ; London, David (Montreal U.)
Electroweak interactions assign a central role to the gauge group $SU(2)_L \times U(1)_Y$, which is either realized linearly (SMEFT) or nonlinearly (e.g., HEFT) in the effective theory obtained when new physics above the electroweak scale is integrated out. Although the discovery of the Higgs boson has made SMEFT the default assumption, nonlinear realization remains possible. [...]
arXiv:2111.07421; UdeM-GPP-TH-21-290.- 2022-04-01 - 7 p. - Published in : Phys. Rev. D 105 (2022) 073008 Fulltext: PhysRevD.105.073008 - PDF; 2111.07421 - PDF;
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6.
(80)
The LHCb state $P_{\psi s}^\Lambda(4338)$ as a triangle singularity / Burns, T.J. (Swansea U.) ; Swanson, E.S. (Pittsburgh U.)
We present a model for the $J/\psi\Lambda$ spectrum in $B^-\to J/\psi \Lambda \bar{p}$ decays, including the $P_{\psi s}^\Lambda(4338)$ baryon recently observed by the LHCb collaboration. We assume production via triangle diagrams which couple to the final state via non-perturbative interactions which are constrained by heavy-quark and $SU_3$-flavor symmetry [...]
arXiv:2208.05106.- 2023-03-10 - 14 p. - Published in : Phys. Lett. B 838 (2023) 137715 Fulltext: 2208.05106 - PDF; 1-s2.0-S0370269323000497-main - PDF;
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7.
(78)
Can the differences in the determinations of $V_{ub}$ and $V_{cb}$ be explained by New Physics? / Crivellin, Andreas (CERN) ; Pokorski, Stefan (Warsaw U.)
The precise determination of the CKM elements $V_{cb}$ and $V_{ub}$ is crucial for any new physics analysis in the flavour sector. Their values can be determined from several tree-level decays: $V_{cb}$ can be extracted from $B\to D\ell\nu$ and $B\to D^*\ell\nu$ while $V_{ub}$ can be obtained from $B\to \pi\ell\nu$, $B\to \rho\ell\nu$ and $B\to\tau\nu$. [...]
arXiv:1407.1320; CERN-PH-TH-2014-124; CERN-PH-TH-2014-124.- 2015-01-07 - 5 p. - Published in : Phys. Rev. Lett. 114 (2015) 011802 APS Open Access article: PDF; Fulltext: PDF; External link: Preprint
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8.
(78)
Fully heavy tetraquark states and their evidences in LHC observations / liu, Ming-Sheng (Hunan Normal U. ; Hunan, LDQSQC ; SICQEA, Changsha) ; Liu, Feng-Xiao (Hunan Normal U. ; Hunan, LDQSQC ; SICQEA, Changsha) ; Zhong, Xian-Hui (Hunan Normal U. ; Hunan, LDQSQC ; SICQEA, Changsha) ; Zhao, Qiang (Beijing, Inst. High Energy Phys. ; North China Electric Power U., Beijing ; Beijing, GUCAS ; SICQEA, Changsha)
Stimulated by the exciting progress on the observations of the fully-charmed tetraquarks at LHC, we carry out a combined analysis of the mass spectra and fall-apart decays of the $1S$-, $2S$-, and $1P$-wave $cc\bar{c}\bar{c}$ states in a nonrelativistic quark model (NRQM). It is found that the $X(6600)$ structure observed in the di-$J/\psi$ invariant mass spectrum can be explained by the $1S$-wave state $T_{(4c)0^{++}}(6550)$. [...]
arXiv:2006.11952.- 2024-04-01 - 14 p. - Published in : Phys. Rev. D 109 (2024) 076017 Fulltext: 2006.11952 - PDF; Publication - PDF;
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9.
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Exclusive semileptonic $B_s\to K \ell \nu$ decays on the lattice / Flynn, J.M. (Southampton U.) ; Hill, R.C. (Edinburgh U.) ; Jüttner, A. (Southampton U. ; CERN) ; Soni, A. (Brookhaven) ; Tsang, J.T. (CERN) ; Witzel, O. (U. Siegen (main)) /RBC/UKQCD Collaboration
Semileptonic $B_s \to K \ell \nu$ decays provide an alternative $b$-decay channel to determine the CKM matrix element $|V_{ub}|$, and to obtain a $R$-ratio to investigate lepton-flavor-universality violations. Results for the CKM matrix element may also shed light on the discrepancies seen between analyses of inclusive or exclusive decays. [...]
arXiv:2303.11280; CERN-TH-2023-046; FERMILAB-PUB-23-115-V; P3H-23-017; SI-HEP-2023-06.- 2023-06-01 - 30 p. - Published in : Phys. Rev. D 107 (2023) 114512 Fulltext: 2303.11280 - PDF; d680f6ddc4c976b8b66d94f169c2fb5a - PDF; Fulltext from Publisher: PDF; External link: Fermilab Library Server
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10.
(76)
Correlating $h\to\mu^+\mu^-$ to the Anomalous Magnetic Moment of the Muon via Leptoquarks / Crivellin, Andreas (CERN ; Zurich U. ; PSI, Villigen) ; Mueller, Dario (Zurich U. ; PSI, Villigen) ; Saturnino, Francesco (Bern U.)
Recently, both ATLAS and CMS measured the decay $h\to\mu^+\mu^-$, finding a signal strength with respect to the Standard Model expectation of $1.2\pm0.6$ and $1.19\substack{+0.41+0.17\\-0.39 -0.16}$, respectively. This provides, for the first time, evidence that the Standard Model Higgs couples to second generation fermions. [...]
arXiv:2008.02643; CERN-TH-2020-134; PSI-PR-20-12; ZU-TH 28/20.- 2021-07-07 - 7 p. - Published in : Phys. Rev. Lett. 127 (2021) 021801 Fulltext from publisher: PDF; External link: CERN Courier article
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