@article{549e32574ecc4281b7f3086eade49c27,
title = "Search for B s 0 → γ γ and a measurement of the branching fraction for B s 0 → φ γ",
abstract = "We search for the decay Bs0→γγ and measure the branching fraction for Bs0→φγ using 121.4 fb-1 of data collected at the (5S) resonance with the Belle detector at the KEKB asymmetric-energy e+e- collider. The Bs0→φγ branching fraction is measured to be (3.6±0.5(stat)±0.3(syst)±0.6(fs))×10-5, where fs is the fraction of Bs(∗)B¯s(∗) in bb¯ events. Our result is in good agreement with the theoretical predictions as well as with a recent measurement from LHCb. We observe no statistically significant signal for the decay Bs0→γγ and set a 90% confidence-level upper limit on its branching fraction at 3.1×10-6. This constitutes a significant improvement over the previous result.",
author = "{(Belle Collaboration)} and D. Dutta and B. Bhuyan and A. Abdesselam and I. Adachi and H. Aihara and {Al Said}, S. and K. Arinstein and Asner, {D. M.} and V. Aulchenko and T. Aushev and R. Ayad and T. Aziz and S. Bahinipati and Bakich, {A. M.} and V. Bansal and V. Bhardwaj and A. Bobrov and G. Bonvicini and M. Bra{\v c}ko and Browder, {T. E.} and D. {\v C}ervenkov and A. Chen and Cheon, {B. G.} and K. Chilikin and R. Chistov and K. Cho and V. Chobanova and Y. Choi and D. Cinabro and J. Dalseno and Z. Dole{\v Z}al and Z. Dr{\'a}sal and A. Drutskoy and K. Dutta and S. Eidelman and H. Farhat and Fast, {J. E.} and O. Frost and V. Gaur and S. Ganguly and A. Garmash and D. Getzkow and Goh, {Y. M.} and B. Golob and H. Hayashii and He, {X. H.} and Hou, {W. S.} and T. Iijima and A. Ishikawa and Kim, {M. J.}",
note = "Publisher Copyright: {\textcopyright} 2015 American Physical Society.",
year = "2015",
month = jan,
day = "8",
doi = "10.1103/PhysRevD.91.011101",
language = "English",
volume = "91",
journal = "Physical Review D - Particles, Fields, Gravitation and Cosmology",
issn = "1550-7998",
publisher = "American Physical Society",
number = "1",
}