Observation of B-0 -> p(Lambda)over-barD(*)(-)

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11320%2F15%3A10315493" target="_blank" >RIV/00216208:11320/15:10315493 - isvavai.cz</a>

Result on the web

<a href="http://dx.doi.org/10.1103/PhysRevLett.115.221803" target="_blank" >http://dx.doi.org/10.1103/PhysRevLett.115.221803</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1103/PhysRevLett.115.221803" target="_blank" >10.1103/PhysRevLett.115.221803</a>

Result language

angličtina

Original language name

Observation of B-0 -> p(Lambda)over-barD(*)(-)

Original language description

We report the first observation of the decays B-0 -> p (Lambda) over barD(*)(-). The data sample of 711 fb(-1) used in this analysis corresponds to 772 x 10(6) B (B) over bar pairs, collected at the Upsilon(4S) resonance by the Belle detector at the KEKBasymmetric-energy e(+)e(-) collider. We observe 19.8 sigma and 10.8 sigma excesses of events for the two decay modes and measure the branching fractions of B-0 -> p (Lambda) over barD(-) and B-0 -> p (Lambda) over barD*(-) to be (25.1 +/- 2.6 +/- 3.5) x10(-6) and (33.6 +/- 6.3 +/- 4.4) x 10(-6), respectively, where the first uncertainties are statistical and the second are systematic. These results are not compatible with the predictions based on the generalized factorization approach. In addition, athreshold enhancement in the dibaryon (p (Lambda) over bar) system is observed, consistent with that observed in similar B decays.

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/LG14034" target="_blank" >LG14034: Study of beyond Standard Model Physics in the B-meson decays in the Belle II international experiment</a><br>

Continuities

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)<br>I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2015

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

115

Issue of the periodical within the volume

22

Country of publishing house

US - UNITED STATES

Number of pages

8

Pages from-to

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UT code for WoS article

000365524500005

EID of the result in the Scopus database

2-s2.0-84949665629