Observation of B-s(0) -} D-s(()*()) + D-s(()*()) Using e(+)e(-) Collisions and a Determination of the B-s-(B)over-bar(s) Width Difference Delta Gamma(s)

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11320%2F10%3A10062371" target="_blank" >RIV/00216208:11320/10:10062371 - isvavai.cz</a>

Result on the web

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DOI - Digital Object Identifier

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Result language

angličtina

Original language name

Observation of B-s(0) -} D-s(()*()) + D-s(()*()) Using e(+)e(-) Collisions and a Determination of the B-s-(B)over-bar(s) Width Difference Delta Gamma(s)

Original language description

We have made the first observation of B-s(0) -} D-s(()*()+) D-s(()*()-) decays using 23.6 fb(-1) of data recorded by the Belle experiment running on the Y(5S) resonance. The branching fractions are measured to be B(B-s(0) -} Ds+Ds-) = (1.03(-0.32-0.25)(+0.39+0.26))% B(B-s(0) -} Ds*D-+/-(s)-/+) = (2.75(-0.71)(+0.83) +/- 0.69)%, and B(B-s(0) -} D-s*(+) D-s*(-)) = (3.08(-1.04-0.86)(+1.22+0.85))%; the sum is B[B-s(0) -} D-s(()*()+) D-s(()*()-)] = (6.85(-1.30-1.80)(+1.53+1.79))%. Assuming B-s(0) -} D-s(()*()+) D-s(()*()-) saturates decays to CP-even final states, the branching fraction determines the ratio Delta Gamma(s)/cos phi, where Delta Gamma(s) is the difference in widths between the two B-s-(B) over bar (s) mass eigenstates, and phi is a CP-violatingweak phase. Taking CP violation to be negligibly small, we obtain Delta Gamma(s)/Delta Gamma(s) = 0.147(-0.030)(+0.036)(stat)(-0.041)(+0.042)(syst), where Gamma(s) is the mean decay width.

Czech name

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Czech description

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Type

J_x - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)

CEP classification

BF - Elementary particle theory and high energy physics

OECD FORD branch

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Project

<a href="/en/project/LA10033" target="_blank" >LA10033: Participation in the Belle a Belle II experiments: study of B-meson decays</a><br>

Continuities

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)<br>Z - Vyzkumny zamer (s odkazem do CEZ)

Publication year

2010

Confidentiality

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

Name of the periodical

Physical Review Letters

ISSN

0031-9007

e-ISSN

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Volume of the periodical

105

Issue of the periodical within the volume

20

Country of publishing house

US - UNITED STATES

Number of pages

6

Pages from-to

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UT code for WoS article

000284052700004

EID of the result in the Scopus database

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