Published September 23, 2015 | Version v1
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Study of the B0 → K*0μ+μ- decay with the LHCb experiment: angular analysis and measurement of the ratio RK*

Creators

Description

Rare beauty decays proceed mostly through the b → s Flavor Changing Neutral Current (FCNC), which is possible only at loop level in the Standard Model. These FCNC processes are subject to GIM (Glashow-Iliopoulos-Maiani mechanism) suppression leading to a rare decay. Therefore the b → s processes are good tools to look for New Physics phenomenon beyond the Standard Model. New Physics particle could become detectable by causing deviation from the Standard Model predictions for observables such as angular observables, branching ratio or CP asymmetries. This thesis present the angular analysis of the B0 → K*0μ-μ+ decay with the whole dataset collected by LHCb during the first run of the LHC. The full set of the angular observables has been measured through a maximum likelihood fit, thanks to an improved selection and the 3 fb-1 of data collected in 2011 and 2012 by LHCb. In addition, the analysis on the measurement of the ratio RK* has also been presented and the results are expected by the end of 2015. (author)

Abstract (French)

Les desintegrations de quark b rares interviennent principalement via des courant neutres changeant la saveur, (Flavor Changing Neutral Current, FCNC en anglais). Le modele Standard n'autorise les courants qu'au niveau des boucles. Ces processus FCNC sont sujets a une suppression de GIM (Glashow-Iliopoulos-Maiani mecanisme) conduisant a des processus rares. Par consequent les desintegration b → s sont de tres bon outils pour la recherche de phenomene de Nouvelle Physique au-dela du Modele Standard. Cette these presente l'analyse angulaire de la desintegration B0→ K*0μ-μ+ avec l'ensemble des donnees collecte par l'experience LHCb durant le run I du LHC. La serie complete des observable angulaires a ete mesuree via un ajustement d'une fonction de vraisemblance, grace a une selection amelioree et les 3 fb-1 de donnees collectees en 2011 et 2012 par LHCb. Par ailleurs, l'analyse du rapport RK* est egalement presente et les resultats sont attendus pour la fin de l'annee 2015. (auteur)

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Additional details

Additional titles

Original title (English)
Etude de la desintegration B0 → K*0μ+μ- avec l'experience LHCb: analyse angulaire et mesure du rapport RK*

Publishing Information

Imprint Pagination
217 p.
Report number
FRNC-TH--11770

INIS

Country of Publication
France
Country of Input or Organization
France
INIS RN
52056900
Subject category
S72: PHYSICS OF ELEMENTARY PARTICLES AND FIELDS;
Resource subtype / Literary indicator
Thesis
Descriptors DEI
ANGULAR DISTRIBUTION; B NEUTRAL MESONS; DATA ANALYSIS; KAONS NEUTRAL; MUONS MINUS; MUONS PLUS; PARTICLE DECAY; PARTICLE IDENTIFICATION
Descriptors DEC
ANTILEPTONS; ANTIMATTER; ANTIPARTICLES; B MESONS; BEAUTY MESONS; BEAUTY PARTICLES; BOSONS; DATA PROCESSING; DECAY; DISTRIBUTION; ELEMENTARY PARTICLES; FERMIONS; HADRONS; KAONS; LEPTONS; MATTER; MESONS; MUONS; PROCESSING; PSEUDOSCALAR MESONS; STRANGE MESONS; STRANGE PARTICLES

Optional Information

Notes
100 refs.; Available from the INIS Liaison Officer for France, see the INIS website for current contact and E-mail addresses