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LHCb Conference Proceedings

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2017-05-09
14:37
Status of New Physics searches with $b \to s \ell^+ \ell^-$ transitions @ LHCb / Bifani, Simone (University of Birmingham (GB))
Rare decays of heavy-flavoured particles provide an ideal laboratory to look for deviations from the Standard Model, and explore energy regimes beyond the LHC reach. Decays proceeding via electroweak penguin diagrams are excellent probes to search for New Physics, and $b \to s \ell^+ \ell^-$processes are particularly interesting since they give access to many observables such as branching fractions, asymmetries and angular observables. [...]
LHCb-PROC-2017-015; CERN-LHCb-PROC-2017-015.- Geneva : CERN, 2017 - 6. Fulltext: PDF;
In : 52nd Rencontres de Moriond on Electroweak Interactions and Unified Theories, La Thuile, Italy, 18 - 25 Mar 2017

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2017-05-09
12:21
The branching fraction and effective lifetime of $B_{(s)}^{0} \rightarrow \mu^+ \mu^-$ at LHCb with Run 1 and Run 2 data / Mulder, Mick (Nikhef National institute for subatomic physics (NL))
After Run 1 of the LHC, global fits to $b \rightarrow s \ell \ell$ observables show a deviation from the Standard Model (SM) with a significance of $\sim$ 4 standard devations. An example of a $b \rightarrow s \ell \ell$ process is the decay of a $B_{s}^0$ meson into two muons ($B_{s}^0 \rightarrow \mu^+ \mu-$) [...]
LHCB-PROC-2017-014; CERN-LHCB-PROC-2017-014; arXiv:1705.03274; CERN-LHCb-PROC-2017-014.- Geneva : CERN, 2017 - 4. Fulltext: LHCb-PROC-2017-014 - PDF; arXiv:1705.03274 - PDF;
In : 52nd Rencontres de Moriond on Electroweak Interactions and Unified Theories, La Thuile, Italy, 18 - 25 Mar 2017

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2017-04-21
16:38
Machine learning and parallelism in the reconstruction of LHCb and its upgrade / Stahl, Marian (Ruprecht-Karls-Universitaet Heidelberg (DE))
After a highly successful first data taking period at the LHC, the LHCb experiment developed a new trigger strategy with a real-time reconstruction, alignment and calibration for Run II. This strategy relies on offline-like track reconstruction in the high level trigger, making a separate offline event reconstruction unnecessary. [...]
LHCb-PROC-2017-013; CERN-LHCb-PROC-2017-013.- Geneva : CERN, 2017 - 8. Fulltext: PDF;
In : 22nd International Conference on Computing in High Energy and Nuclear Physics, CHEP 2016, San Francisco, Usa, 10 - 14 Oct 2016

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2017-04-10
09:38
Production measurements at LHCb / Rachwal, Bartlomiej (AGH University of Science and Technology (PL))
The $\text{LHC}b$ detector, with its excellent momentum resolution and flexible trigger strategy, is ideally suited for measuring heavy quark and quarkonia production properties. In addition, the new system of forward shower counters installed upstream and downstream has begun to be used, therefore the experiment is being suited to measure central exclusive production. [...]
LHCb-PROC-2017-012; CERN-LHCb-PROC-2017-012.- Geneva : CERN, 2017 - 10. Fulltext: PDF;
In : 23rd Cracow Epiphany Conference on Particle Theory Meets the First Data from LHC Run 2, Cracow, Poland, 9 - 12 Jan 2017

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2017-04-07
14:42
Development and test of the $\rm CO_2$ evaporative cooling system for the LHCb UT Tracker Upgrade / Coelli, Simone (Università degli Studi e INFN Milano (IT))
Abstract: The LHCb upgrade requires a new silicon strip tracker detector placed between the vertex locator and the magnet. The new detector will have improved performance in charged particle tracking and triggering. [...]
LHCb-PROC-2017-011; CERN-LHCb-PROC-2017-011.- Geneva : CERN, 2017 - 12. Fulltext: PDF;
In : 14th Topical Seminar on Innovative Particle and Radiation Detectors , Siena, Italy, 3 - 6 Oct 2016

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2017-03-24
14:50
$CP$ Violation in $b$- and $c$-hadron decays at LHCb / Steinkamp, Olaf (Universitaet Zuerich (CH))
Testing the Standard Model of particle physics by precision measurements of CP violating observables in the decays of b and c hadrons has been one of the design goals of the LHCb experiment. World-leading measurements have been performed of the semileptonic asymmetry, $a^{sl}_s$, and of the mixing-induced CP-violating phase $\phi_s$ in the $B^0_s {\overline B}{}^0_s$ system. [...]
LHCb-PROC-2017-010; CERN-LHCb-PROC-2017-010.- Geneva : CERN, 2017 - 10. Fulltext: PDF;
In : Kruger2016 - Workshop on Discovery Physics at the LHC, Mpumulanga, South Africa, 4 - 9 Dec 2016

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2017-03-03
16:08
The early career, gender, and diversity actions within the LHCb Collaboration (poster) / Sciascia, Barbara (Istituto Nazionale Fisica Nucleare Frascati (IT)) ; Rademacker, Jonas (University of Bristol (GB))
Numerous surveys of modern particle physics indicate that the discipline is still largely a male pursuit, and one in which women and other marginalised groups continue to face discriminatory practices. The fraction of female particle physicists reduces with each career stage. [...]
LHCb-PROC-2017-009; CERN-LHCb-PROC-2017-009.- Geneva : CERN, 2016 - 2. Fulltext: PDF;
In : 38th International Conference on High Energy Physics, Chicago, IL, USA, 03 - 10 Aug 2016

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2017-03-03
16:03
Prompt physics analysis from the trigger candidates at LHCb: strategy and new dedicated "TURBO" and PID calibration streams / Sciascia, Barbara (Istituto Nazionale Fisica Nucleare Frascati (IT))
During the first long shutdown of the LHC (2013-2014), the LHCb detector remained essentially unchanged, while the trigger system has been completely revised. Upgrades to the LHCb computing infrastructure have allowed for high quality decay information to be calculated by the software trigger, making separate offline event reconstruction unnecessary. [...]
LHCb-PROC-2017-008; CERN-LHCb-PROC-2017-008.- Geneva : CERN, 2016 - 6. Fulltext: PDF;
In : 38th International Conference on High Energy Physics, Chicago, IL, USA, 03 - 10 Aug 2016

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2017-02-23
11:39
Charmless $b$-meson and $b$-baryon decays at LHCb / Nasteva, Irina (Univ. Federal do Rio de Janeiro (BR))
The latest LHCb results for charmless $b$-meson and $b$-baryon decays, using Run I data collected by the LHCb experiment at centre-of-mass energies of 7 and 8 TeV, are presented. The search for charmless three-body decays of the $\Lambda_b^0$ and $\Xi_b^0$ baryons to the final states $\Lambda h^+h^{\prime -}$ ($h^{(\prime)} = \pi$ or $K$) results in the first observation of $\Lambda_b^0 \to \Lambda K^+\pi^-$ and $\Lambda_b^0 \to \Lambda K^+K^-$ decays and measurements of their branching fractions and \CP asymmetries, as well as evidence of the $\Lambda_b^0 \to \Lambda \pi^+\pi^-$ decay and limits on the branching fractions of $\Xi_b^0$ baryon decays. [...]
LHCb-PROC-2017-007; CERN-LHCb-PROC-2017-007.- Geneva : CERN, 2017 - 6. Fulltext: PDF;
In : BEACH 2016: XIIth International Conference on Beauty, Charm, and Hyperons in Hadronic Interactions, Fairfax, Virginia, United States Of America, 12 - 18 Jun 2016

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2017-02-17
15:25
LHCb results in proton-nucleus collisions at the LHC / Mueller, Katharina (Universitaet Zuerich (CH))
The forward acceptance of the LHCb detector allows it to probe proton-ion collisions in a unique kinematic range, complementary to the other LHC experiments. The production of $J/\Psi$ and $\Upsilon$-mesons decaying into two muons is studied at the LHCb experiment in proton-lead collisions at a proton-nucleon centre-of-mass energy $\sqrt sNN = 5 TeV$. [...]
LHCb-PROC-2017-006; CERN-LHCb-PROC-2017-006.- Geneva : CERN, 2015 - 5. Fulltext: PDF;
In : STARS2015 - 3rd Caribbean Symposium on Cosmology, Gravitation, Nuclear and Astroparticle Physics, Havana, Cuba, 10 - 16 May 2015

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