CERN Accelerating science

CERN Document Server 39 εγγραφές βρέθηκαν  1 - 10επόμενοτέλος  μετάβαση στην εγγραφή: Η έρευνα πήρε 0.67 δευτερόλεπτα. 
1.
First measurement of $Z \to \mu^+\mu^-$ angular coefficients in the forward region of $pp$ collisions at $\sqrt{s} = 13$ TeV / LHCb Collaboration
The first study of the angular distribution of $\mu^+ \mu^-$ pairs produced in the forward rapidity region via the Drell-Yan reaction $pp \rightarrow \gamma^{*}/Z +X \rightarrow l^+ l^- + X$ is presented, using data collected with the LHCb detector at a centre-of-mass energy of 13TeV, corresponding to an integrated luminosity of 5.1 $\rm{fb}^{-1}$. The coefficients of the five leading terms in the angular distribution are determined as a function of the dimuon transverse momentum and rapidity. [...]
arXiv:2203.01602; LHCb-PAPER-2021-048; CERN-EP-2022-030; LHCB-PAPER-2021-048.- 2022-08-24 - 11 p. - Published in : Phys. Rev. Lett. 129 (2022) 091801 Fulltext: PDF; Related data file(s): ZIP; External link: Previous draft version
2.
Measurement of $\tau _\text {L}$ using the ${B} _s^0 \rightarrow J/\psi \eta $ decay mode / LHCb Collaboration
Using a proton-proton collision data sample collected by the LHCb detector and corresponding to an integrated luminosity of 5.7 $\text{fb}^{-1}$, the lifetime of the $B_{s}^{0}$ mass eigenstate, $\tau_{L}$, is measured using $B_{s}^{0} \to J/\psi \eta$ decay mode to be $\tau_{L}$ = 1.445 $\pm$ 0.016(stat) $\pm$ 0.008(syst) ps. A combination of this result with a previous LHCb analysis using an independent dataset corresponding to 3 $\text{fb}^{-1}$ of integrated luminosity gives $\tau_{L}$ = 1.452 $\pm$ 0.014 $\pm$ 0.007 $\pm$ 0.002 ps, where the first uncertainty is statistical, the second due to the uncorrelated part of the systematic uncertainty and the third due to the correlated part of the systematic uncertainty..
arXiv:2206.03088; LHCb-PAPER-2022-010 CERN-EP-2022-099; CERN-EP-2022-099; LHCb-PAPER-2022-010.- 2023-07-17 - 14 p. - Published in : Eur. Phys. J. C 83 (2023) 629 Fulltext: 2206.03088 - PDF; document - PDF;
3.
The Road Ahead for CODEX-b / Aielli, Giulio (Rome U., Tor Vergata) ; Alimena, Juliette (CERN) ; Beacham, James (Duke U.) ; Ben-Haim, Eli (Paris U., VI-VII) ; Borsato, Martino (Kirchhoff Inst. Phys.) ; Charles, Matthew John (Paris U., VI-VII) ; Vidal, Xabier Cid (Santiago de Compostela U., IGFAE) ; Coco, Victor (CERN) ; De Roeck, Albert (CERN) ; Dey, Biplab (Eotvos Lorand U., Budapest, Inst. Theor. Phys.) et al.
In this Snowmass contribution we present a comprehensive status update on the progress and plans for the proposed CODEX-b detector, intended to search for long-lived particles beyond the Standard Model. [...]
arXiv:2203.07316.
- 13 p.
eConf - Fulltext
4.
Searches for rare $ {B}_s^0 $ and B$^{0}$ decays into four muons / LHCb Collaboration
Searches for rare $B_s^0$ and $B^0$ decays into four muons are performed using proton-proton collision data recorded by the LHCb experiment, corresponding to an integrated luminosity of 9 $\text{fb}^{-1}$. Direct decays and decays via light scalar and $J/\psi$ resonances are considered. [...]
arXiv:2111.11339; LHCb-PAPER-2021-039; CERN-EP-2021-236.- 2022-03-17 - 27 p. - Published in : JHEP 2203 (2022) 109 Fulltext: 2111.11339 - PDF; document - PDF; Fulltext from publisher: PDF; Related data file(s): ZIP;
5.
Review of opportunities for new long-lived particle triggers in Run 3 of the Large Hadron Collider / Alimena, Juliette (ed.) (CERN) ; Beacham, James (ed.) (Duke U. (main)) ; Blekman, Freya (ed.) (DESY) ; Vidal, Adrián Casais (ed.) (Santiago de Compostela U., IGFAE) ; Vidal, Xabier Cid (ed.) (Santiago de Compostela U., IGFAE) ; Citron, Matthew (ed.) (UC, Santa Barbara (main)) ; Curtin, David (ed.) (U. Toronto (main)) ; De Roeck, Albert (ed.) (CERN) ; Desai, Nishita (ed.) (Tata Inst.) ; Di Petrillo, Karri Folan (ed.) (Fermilab) et al.
Long-lived particles (LLPs) are highly motivated signals of physics Beyond the Standard Model (BSM) with great discovery potential and unique experimental challenges. [...]
arXiv:2110.14675 ; CERN-LPCC-2021-01.
- 43.
Fermilab Library Server - Fulltext - Fulltext
6.
Search for massive long-lived particles decaying semileptonically at $\sqrt{s}=13$ TeV / LHCb Collaboration
A search is performed for massive long-lived particles (LLP) decaying semileptonically into a muon and two quarks. Two kinds of LLP production processes were considered. [...]
arXiv:2110.07293; LHCb-PAPER-2021-028; CERN-EP-2021-186; LHCB-PAPER-2021-028.- Geneva : CERN, 2022-04-28 - 31 p. - Published in : Eur. Phys. J. C 82 (2022) 373 Fulltext: 2110.07293 - PDF; document - PDF; Related data file(s): ZIP; Supplementary information: ZIP;
7.
Dark sector and new ideas for LLP searches at LHCb / Cid Vidal, Xabier (Universidade de Santiago de Compostela (ES))
LHCb-TALK-2021-252.- Geneva : CERN, 2021 Fulltext: PDF; In : Anomalies and Precision in the Belle II Era - Workshop
8.
Measurement of $J/\psi$ production cross-sections in $pp$ collisions at $\sqrt{s}=5$ TeV / LHCb Collaboration
The production cross-sections of $J/\psi$ mesons in proton-proton collisions at a centre-of-mass energy of $\sqrt{s}=5$ TeV are measured using a data sample corresponding to an integrated luminosity of $9.13\pm0.18~\text{pb}^{-1}$, collected by the LHCb experiment. The cross-sections are measured differentially as a function of transverse momentum, $p_{\text{T}}$, and rapidity, $y$, and separately for $J/\psi$ mesons produced promptly and from beauty hadron decays (nonprompt). [...]
arXiv:2109.00220; LHCb-PAPER-2021-020; CERN-EP-2021-156; LHCB-PAPER-2021-020.- Geneva : CERN, 2021 - 34 p. - Published in : JHEP 2111 (2021) 181 Fulltext: PDF; Fulltext from publisher: PDF; Related data file(s): ZIP; Supplementary information: ZIP;
9.
Results of the 2021 ECFA Early-Career Researcher Survey on Training in Instrumentation / ECFA Early-Career Researcher Panel Collaboration
The European Committee for Future Accelerators (ECFA) Early-Career Researchers (ECR) Panel was invited by the ECFA Detector R&D Roadmap conveners to collect feedback from the European ECR community. [...]
arXiv:2107.05739.
- 32 p.
Fulltext - Fulltext
10.
First measurement of the $C\!P$-violating phase in ${{B} ^0_{s}} \!\rightarrow {{J /\psi }} (\rightarrow e ^+e ^-$)$\phi $ decays / LHCb Collaboration
A flavour-tagged time-dependent angular analysis of $B^0_s\to J/\psi\phi$ decays is presented where the $J/\psi$ meson is reconstructed through its decay to an $e^+e^-$ pair. The analysis uses a sample of $pp$ collision data recorded with the LHCb experiment at centre-of-mass energies of $7$ and $8$ TeV, corresponding to an integrated luminosity of $3$ fb$^{-1}$. [...]
arXiv:2105.14738; LHCb-PAPER-2020-042; CERN-EP-2021-064; LHCB-PAPER-2020-042.- Geneva : CERN, 2021-11-24 - 28 p. - Published in : Eur. Phys. J. C 81 (2021) 1026 Fulltext: document - PDF; LHCb-PAPER-2020-042 - PDF; 2105.14738 - PDF; Related data file(s): ZIP; Supplementary information: ZIP;

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