Study of the B+cJ/ψD+s and B+cJ/ψD∗+s decays with the ATLAS detector

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68378271%3A_____%2F16%3A00470661" target="_blank" >RIV/68378271:_____/16:00470661 - isvavai.cz</a>

Výsledek na webu

<a href="http://dx.doi.org/10.1140/epjc/s10052-015-3743-8" target="_blank" >http://dx.doi.org/10.1140/epjc/s10052-015-3743-8</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1140/epjc/s10052-015-3743-8" target="_blank" >10.1140/epjc/s10052-015-3743-8</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Study of the B+cJ/ψD+s and B+cJ/ψD∗+s decays with the ATLAS detector

Popis výsledku v původním jazyce

The decays B+cJ/ψD+s and B+cJ/ψD∗+s are studied with the ATLAS detector at the LHC using a dataset corresponding to integrated luminosities of 4.9 and 20.6 fb1 of pp collisions collected at centre-of-mass energies s=7 TeV and 8 TeV, respectively. Signal candidates are identified through J/ψμ+μ and D(∗)+sϕπ+(γ/π0) decays. With a two-dimensional likelihood fit involving the B+c reconstructed invariant mass and an angle between the μ+ and D+s candidate momenta in the muon pair rest frame, the yields of B+cJ/ψD+s and B+cJ/ψD∗+s , and the transverse polarisation fraction in B+cJ/ψD∗+s decay are measured. The transverse polarisation fraction is determined to be Γ(B+cJ/ψD∗+s)/Γ(B+cJ/ψD∗+s)=0.380.230.07 , and the derived ratio of the branching fractions of the two modes is BB+cJ/ψD∗+s/BB+cJ/ψD+s=2.8+1.20.80.3 , where the first error is statistical and the second is systematic. Finally, a sample of B+cJ/ψπ+ decays is used to derive the ratios of branching fractions BB+cJ/ψD+s/BB+cJ/ψπ+=3.81.10.40.2 and BB+cJ/ψD∗+s/BB+cJ/ψπ+=10.43.11.50.6 , where the third error corresponds to the uncertainty of the branching fraction of D+sϕ(K+K)π+ decay.

Název v anglickém jazyce

Study of the B+cJ/ψD+s and B+cJ/ψD∗+s decays with the ATLAS detector

Popis výsledku anglicky

The decays B+cJ/ψD+s and B+cJ/ψD∗+s are studied with the ATLAS detector at the LHC using a dataset corresponding to integrated luminosities of 4.9 and 20.6 fb1 of pp collisions collected at centre-of-mass energies s=7 TeV and 8 TeV, respectively. Signal candidates are identified through J/ψμ+μ and D(∗)+sϕπ+(γ/π0) decays. With a two-dimensional likelihood fit involving the B+c reconstructed invariant mass and an angle between the μ+ and D+s candidate momenta in the muon pair rest frame, the yields of B+cJ/ψD+s and B+cJ/ψD∗+s , and the transverse polarisation fraction in B+cJ/ψD∗+s decay are measured. The transverse polarisation fraction is determined to be Γ(B+cJ/ψD∗+s)/Γ(B+cJ/ψD∗+s)=0.380.230.07 , and the derived ratio of the branching fractions of the two modes is BB+cJ/ψD∗+s/BB+cJ/ψD+s=2.8+1.20.80.3 , where the first error is statistical and the second is systematic. Finally, a sample of B+cJ/ψπ+ decays is used to derive the ratios of branching fractions BB+cJ/ψD+s/BB+cJ/ψπ+=3.81.10.40.2 and BB+cJ/ψD∗+s/BB+cJ/ψπ+=10.43.11.50.6 , where the third error corresponds to the uncertainty of the branching fraction of D+sϕ(K+K)π+ decay.

Druh

J_x - Nezařazeno - Článek v odborném periodiku (Jimp, Jsc a Jost)

CEP obor

BF - Elementární částice a fyzika vysokých energií

OECD FORD obor

—

Projekt

—

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2016

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

European Physical Journal C

ISSN

1434-6044

e-ISSN

—

Svazek periodika

76

Číslo periodika v rámci svazku

1

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

17

Strana od-do

—

Kód UT WoS článku

000370645100003

EID výsledku v databázi Scopus

2-s2.0-84953865617