CERN Accelerating science

Article
Report number arXiv:1602.07252 ; LHCB-PAPER-2015-056 ; CERN-EP-2016-030 ; LHCB-PAPER-2015-056 ; CERN-EP-2016-030
Title A new algorithm for identifying the flavour of Bs0 mesons at LHCb
Related titleA new algorithm for identifying the flavour of Bs0 mesons at LHCb
Author(s) LHCb collaboration  Показать всех 735 авторов
Publication 2016-05-17
Imprint 23 Feb 2016
Number of pages 26
Note All figures and tables, along with any supplementary material and additional information, are available at https://lhcbproject.web.cern.ch/lhcbproject/Publications/LHCbProjectPublic/LHCb-PAPER-2015-056.html
In: JINST 11 (2016) P05010
DOI 10.1088/1748-0221/11/05/P05010
Subject category Particle Physics - Experiment
Accelerator/Facility, Experiment CERN LHC ; LHCb
Free keywords flavor physics ; B physics ; CP violation ; oscillation ; experimental results
Abstract A new algorithm for the determination of the initial flavour of Bs0 mesons is presented. The algorithm is based on two neural networks and exploits the b hadron production mechanism at a hadron collider. The first network is trained to select charged kaons produced in association with the Bs0 meson. The second network combines the kaon charges to assign the Bs0 flavour and estimates the probability of a wrong assignment. The algorithm is calibrated using data corresponding to an integrated luminosity of 3 fb1 collected by the LHCb experiment in proton-proton collisions at 7 and 8 TeV centre-of-mass energies. The calibration is performed in two ways: by resolving the Bs0-B¯s0 flavour oscillations in Bs0Dsπ+ decays, and by analysing flavour-specific Bs2(5840)0B+K decays. The tagging power measured in Bs0Dsπ+ decays is found to be (1.80±0.19(stat)±0.18(syst))\%, which is an improvement of about 50\% compared to a similar algorithm previously used in the LHCb experiment.
Related document supersedes: LHCb-CONF-2012-033
Copyright/License preprint: © 2016-2024 CERN (License: CC-BY-4.0)
License
publication: © 2016-2024 CERN (License: CC-BY-3.0)



Corresponding record in: Inspire
Email contact: claudia.dupraz@cern.ch


 Запись создана 2016-02-25, последняя модификация 2024-08-17


Полный текст:
arXiv:1602.07252 - Загрузка полного текстаPDF
10.1088_1748-0221_11_05_P05010 - Загрузка полного текстаPDF
(дополнительные файлы)
%(x_sitename) ссылка:
Загрузка полного текстаFigures, tables and other information
  • Send to ScienceWise.info