Measurement of the branching fractions of B RIGHTWARDS ARROW D(ASTERISK OPERATOR)K-K(ASTERISK OPERATOR)0(S) and B RIGHTWARDS ARROW D(ASTERISK OPERATOR)D-s decays at Belle II

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11320%2F24%3A10494170" target="_blank" >RIV/00216208:11320/24:10494170 - isvavai.cz</a>

Výsledek na webu

<a href="https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=FHRfm5bZeX" target="_blank" >https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=FHRfm5bZeX</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1007/JHEP08(2024)206" target="_blank" >10.1007/JHEP08(2024)206</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Measurement of the branching fractions of B RIGHTWARDS ARROW D(ASTERISK OPERATOR)K-K(ASTERISK OPERATOR)0(S) and B RIGHTWARDS ARROW D(ASTERISK OPERATOR)D-s decays at Belle II

Popis výsledku v původním jazyce

We present measurements of the branching fractions of eight B0 RIGHTWARDS ARROWD(ASTERISK OPERATOR)+K-K(ASTERISK OPERATOR)0(S) , B- RIGHTWARDS ARROW D(ASTERISK OPERATOR)0K-K(ASTERISK OPERATOR)0(S) decay channels. The results are based on data fromSuperKEKB electron-positron collisions at the Υ(4S) resonance collected with the Belle IIdetector, corresponding to an integrated luminosity of 362 fb-1. The event yields are extractedfrom fits to the distributions of the difference between expected and observed Bmeson energy, and are efficiency-corrected as a function of m(K-K(ASTERISK OPERATOR)0(S) ) and m(D(ASTERISK OPERATOR)K(ASTERISK OPERATOR)0(S) ) inorder to avoid dependence on the decay model. These results include the first observationof B0 RIGHTWARDS ARROW D+K-K0S, B- RIGHTWARDS ARROW DASTERISK OPERATOR0K-K0S, and B0 RIGHTWARDS ARROW DASTERISK OPERATOR+K-K0Sdecays and a significantimprovement in the precision of the other channels compared to previous measurements. Thehelicity-angle distributions and the invariant mass distributions of the K-K(ASTERISK OPERATOR)0(S) systems arecompatible with quasi-two-body decays via a resonant transition with spin-parity JP = 1-for the K-K0Ssystems and JP = 1+ for the K-KASTERISK OPERATOR0 systems. We also present measurementsof the branching fractions of four B0 RIGHTWARDS ARROW D(ASTERISK OPERATOR)+D-s , B- RIGHTWARDS ARROW D(ASTERISK OPERATOR)0D-s decay channels with aprecision compatible to the current world averages.

Název v anglickém jazyce

Measurement of the branching fractions of B RIGHTWARDS ARROW D(ASTERISK OPERATOR)K-K(ASTERISK OPERATOR)0(S) and B RIGHTWARDS ARROW D(ASTERISK OPERATOR)D-s decays at Belle II

Popis výsledku anglicky

We present measurements of the branching fractions of eight B0 RIGHTWARDS ARROWD(ASTERISK OPERATOR)+K-K(ASTERISK OPERATOR)0(S) , B- RIGHTWARDS ARROW D(ASTERISK OPERATOR)0K-K(ASTERISK OPERATOR)0(S) decay channels. The results are based on data fromSuperKEKB electron-positron collisions at the Υ(4S) resonance collected with the Belle IIdetector, corresponding to an integrated luminosity of 362 fb-1. The event yields are extractedfrom fits to the distributions of the difference between expected and observed Bmeson energy, and are efficiency-corrected as a function of m(K-K(ASTERISK OPERATOR)0(S) ) and m(D(ASTERISK OPERATOR)K(ASTERISK OPERATOR)0(S) ) inorder to avoid dependence on the decay model. These results include the first observationof B0 RIGHTWARDS ARROW D+K-K0S, B- RIGHTWARDS ARROW DASTERISK OPERATOR0K-K0S, and B0 RIGHTWARDS ARROW DASTERISK OPERATOR+K-K0Sdecays and a significantimprovement in the precision of the other channels compared to previous measurements. Thehelicity-angle distributions and the invariant mass distributions of the K-K(ASTERISK OPERATOR)0(S) systems arecompatible with quasi-two-body decays via a resonant transition with spin-parity JP = 1-for the K-K0Ssystems and JP = 1+ for the K-KASTERISK OPERATOR0 systems. We also present measurementsof the branching fractions of four B0 RIGHTWARDS ARROW D(ASTERISK OPERATOR)+D-s , B- RIGHTWARDS ARROW D(ASTERISK OPERATOR)0D-s decay channels with aprecision compatible to the current world averages.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10300 - Physical sciences

Projekt

<a href="/cs/project/GA22-18469S" target="_blank" >GA22-18469S: Studium jevů za Standardním modelem ve flavor sektoru na experimentu Belle II</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2024

Kód důvěrnosti údajů

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

Název periodika

Journal of High Energy Physics

ISSN

1029-8479

e-ISSN

1029-8479

Svazek periodika

2024

Číslo periodika v rámci svazku

8

Stát vydavatele periodika

DE - Spolková republika Německo

Počet stran výsledku

36

Strana od-do

206

Kód UT WoS článku

001318710300002

EID výsledku v databázi Scopus

2-s2.0-85202919200