A. Vinokurova (Author), Marko Bračko (Author), Boštjan Golob (Author), Samo Korpar (Author), Peter Križan (Author), Rok Pestotnik (Author), Marko Petrič (Author), Eva Ribežl (Author), Samo Stanič (Author), Marko Starič (Author), Luka Šantelj (Author), Anže Zupanc (Author)

Abstract

We report a search for B decays to selected final states with the ηc meson: B± → K±ηcπ+π−, B± → K±ηcω, B± → K±ηcη and B± → K±ηcπ0. The analysis is based on 772 × 10^6 B¯B pairs collected at the Υ(4S) resonance with the Belle detector at the KEKB asymmetric-energy e+e− collider. We set 90% confidence level upper limits on the branching fractions of the studied B decay modes, independent of intermediate resonances, in the range (0.6–5.3)×10^−4. We also search for molecular-state candidates in the D^0 ¯D^∗0 − ¯D^0D^∗0, D^0 ¯D^0 + ¯D^0D^0 and D^∗0¯D^∗0 + ¯D^∗0D^∗0 combinations, neutral partners of the Z(3900)± and Z(4020)±, and a poorly understood state X(3915) as possible intermediate states in the decay chain, and set 90% confidence level upper limits on the product of branching fractions to the mentioned intermediate states and decay branching fractions of these states in the range (0.6–6.9)×10^−5.

Keywords

exotics;quarkonium;e+-e- experiments;B physics;particle and resonance production;

Data

Language: English
Year of publishing:
Typology: 1.01 - Original Scientific Article
Organization: UM FKKT - Faculty of Chemistry and Chemical Engineering
UDC: 539.1
COBISS: 29001255 Link will open in a new window
ISSN: 1029-8479
Views: 887
Downloads: 427
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Other data

Secondary language: Slovenian
Secondary keywords: eksotika;kvarkonij;e+-e- eksperimenti;B fizika;produkcija delcev in resonance;
URN: URN:SI:UM:
Type (COBISS): Scientific work
Pages: str. 132-1-132-23
Volume: ǂVol. ǂ2015
Issue: ǂno. ǂ06
Chronology: 2015
DOI: 10.1007/JHEP06(2015)132
ID: 10844764