Towards the measurement of the CKM angle γ using the Tree-level decay B → D[hh]K*[Ksπ] at the LHCb experiment
Description
This document presents, a preliminary study towards the measurement of the CKM angle through the tree level decay B → D[hh]K*[Ksπ] where hh = K+K-, π+π- or Kπ. Using the LHCb data collected in 2011 2012 and the Monte Carlo simulation sample, a selection on discriminating variables has been preformed in order to purify the decay chain from the background events. Following the selection cuts, the reconstructed invariant mass distributions of the particles Ks, K*, D, B were presented. The subsisting events were split based on D's final state and B's charge. Afterwards, they were used for the GLW and ADS methods where the CP violation observables AADS, RADS, ACP+, RCP+ were measured experimentally. (author)
Abstract (French)
Ce document presente, une etude preliminaire vers la mesure de l'angle CKM par la desintegration en arbre B #-># D[hh]K*[K_s#pi#] ou hh = K"+K"-, #pi#"+#pi#"- ou K#pi#. En utilisant les donnees de LHCb rassemblees en 2011 2012 et l'echantillon de donnees de la simulation Monte Carlo, une selection sur des differentes variables discriminantes a ete preformee dans le but de purifier la chaine de desintegration du bruit de fond. Apres les coupures de selection, les distributions de masse invariante reconstruite des particules K_s, K*, D, B ont ete presentees. Les evenements restants ont ete separes en se basant sur l'etat final du D et la charge de B. Ensuite, ils ont ete utilises pour les methodes GLW et ADS ou les observables de violation CP A_A_D_S, R_A_D_S, A_C_P_+, R_C_P_+ ont ete mesurees experimentalement. (auteur)
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Additional details
Publishing Information
- Imprint Pagination
- 40 p.
- Report number
- INIS-FR--25-0261
INIS
- Country of Publication
- France
- Country of Input or Organization
- France
- Subject category
- S72: PHYSICS OF ELEMENTARY PARTICLES AND FIELDS;
- Resource subtype / Literary indicator
- Thesis
- Descriptors DEI
- CP INVARIANCE; MASS DISTRIBUTION; MONTE CARLO METHOD; LHCB DETECTOR; COMPUTERIZED SIMULATION; EFFECTIVE MASS; PARTICLE DECAY; REST MASS; MIXING ANGLE; BACKGROUND RADIATION; PARTICLE IDENTIFICATION; PIONS PLUS; B MINUS MESONS
- Descriptors DEC
- B MESONS; BEAUTY MESONS; BEAUTY PARTICLES; BOSONS; CALCULATION METHODS; DECAY; DISTRIBUTION; ELEMENTARY PARTICLES; HADRONS; INVARIANCE PRINCIPLES; MASS; MEASURING INSTRUMENTS; MESONS; PIONS; PSEUDOSCALAR MESONS; RADIATION DETECTORS; RADIATIONS; SIMULATION; SPATIAL DISTRIBUTION
- Proposed descriptors and Free-text terms
- LHCb; CKM angle gamma; CP violation observables; selection; discriminating variables
Optional Information
- Notes
- 22 refs.; Available from the INIS Liaison Officer for France, see the INIS website for current contact and E-mail addresses