Precision measurement of the B0 meson lifetime using B0→J/ψK∗0 decays with the ATLAS detector

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68378271%3A_____%2F25%3A00644792" target="_blank" >RIV/68378271:_____/25:00644792 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/68407700:21220/25:00389020 RIV/68407700:21240/25:00389020 RIV/68407700:21340/25:00389020 RIV/68407700:21670/25:00389020 a 2 dalších

Výsledek na webu

<a href="https://hdl.handle.net/11104/0374681" target="_blank" >https://hdl.handle.net/11104/0374681</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1140/epjc/s10052-025-14232-8" target="_blank" >10.1140/epjc/s10052-025-14232-8</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Precision measurement of the B0 meson lifetime using B0→J/ψK∗0 decays with the ATLAS detector

Popis výsledku v původním jazyce

A measurement of the B0 meson lifetime using B0→J/ψK∗0 decays in data from 13 TeV proton–proton collisions with an integrated luminosity of 140fb-1 recorded by the ATLAS detector at the LHC is presented. The measured effective lifetime is τ=1.5053±0.0012 (stat.)±0.0035 (syst.) ps. The average decay width extracted from the effective lifetime, using parameters from external sources, is Γd=0.6639±0.0005 (stat.)±0.0016 (syst.)±0.0038 (ext.) ps−1 where the uncertainties are statistical, systematic and from external sources. The earlier ATLAS measurement of Γs in the Bs0→J/ψϕ decay was used to derive a value for the ratio of the average decay widths Γd and Γs for B0 and Bs0 mesons respectively, of Γd/Γs=0.9905±0.0022 (stat.)±0.0036 (syst.)±0.0057 (ext.). The measured lifetime, average decay width and decay width ratio are in agreement with theoretical predictions and with measurements by other experiments. This measurement provides the most precise result of the effective lifetime of the B0 meson to date.

Název v anglickém jazyce

Precision measurement of the B0 meson lifetime using B0→J/ψK∗0 decays with the ATLAS detector

Popis výsledku anglicky

A measurement of the B0 meson lifetime using B0→J/ψK∗0 decays in data from 13 TeV proton–proton collisions with an integrated luminosity of 140fb-1 recorded by the ATLAS detector at the LHC is presented. The measured effective lifetime is τ=1.5053±0.0012 (stat.)±0.0035 (syst.) ps. The average decay width extracted from the effective lifetime, using parameters from external sources, is Γd=0.6639±0.0005 (stat.)±0.0016 (syst.)±0.0038 (ext.) ps−1 where the uncertainties are statistical, systematic and from external sources. The earlier ATLAS measurement of Γs in the Bs0→J/ψϕ decay was used to derive a value for the ratio of the average decay widths Γd and Γs for B0 and Bs0 mesons respectively, of Γd/Γs=0.9905±0.0022 (stat.)±0.0036 (syst.)±0.0057 (ext.). The measured lifetime, average decay width and decay width ratio are in agreement with theoretical predictions and with measurements by other experiments. This measurement provides the most precise result of the effective lifetime of the B0 meson to date.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10303 - Particles and field physics

Projekt

<a href="/cs/project/EH22_008%2F0004632" target="_blank" >EH22_008/0004632: Výzkum základních stavebních kamenů hmoty s využitím špičkových technologií</a><br>

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2025

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

1434-6052

Svazek periodika

85

Číslo periodika v rámci svazku

7

Stát vydavatele periodika

DE - Spolková republika Německo

Počet stran výsledku

27

Strana od-do

736

Kód UT WoS článku

001679181000001

EID výsledku v databázi Scopus

2-s2.0-105012447680