Search for η and η′ invisible decays in J/ψ→η and η′
Date
2013-01-24
Authors
Journal Title
Journal ISSN
Volume Title
Publisher
American Physical Society
Abstract
Using a sample of (225.3 +/- 2.8) x 10(6) J/psi decays collected with the BESIII detector at BEPCII, searches for invisible decays of eta and eta ' in J/psi -> phi eta and phi eta ' are performed. Decays of phi -> K+K- are used to tag the eta and eta ' decays. No signals above background are found for the invisible decays, and upper limits at the 90% confidence level are determined to be 2.6 x 10(-4) for the ratio B(eta -> invisible)/B(eta ->gamma gamma) and 2.4 x 10(-2) for B(eta '-> invisible)/B(eta '->gamma gamma). These limits may be used to constrain light dark matter particles or spin-1 U bosons. DOI: 10.1103/PhysRevD.87.012009
Description
Çalışmada 357 yazar bulunmaktadır. Bu yazarlardan sadece Bursa Uludağ Üniversitesi mensuplarının girişleri yapılmıştır
Keywords
Astronomy & astrophysics, Physics, Systems
Citation
Ablikim, M. vd. (2013). "Search for η and η′ invisible decays in J/ψ→η and η′". Physical Review D - Particles, Fields, Gravitation and Cosmology, 87(1).