Search for B s 0 → γ γ and a measurement of the branching fraction for B s 0 → φ γ

(Belle Collaboration)

Research output: Contribution to journalArticle

13 Citations (Scopus)

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.

Original languageEnglish
Article number011101
JournalPhysical Review D - Particles, Fields, Gravitation and Cosmology
Volume91
Issue number1
DOIs
Publication statusPublished - 2015 Jan 8

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decay
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detectors
predictions
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All Science Journal Classification (ASJC) codes

  • Nuclear and High Energy Physics
  • Physics and Astronomy (miscellaneous)

Cite this

@article{02b522af72e74837a3c06ec717fc7088,
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. Bračko and Browder, {T. E.} and D. Červenkov 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. DoleŽal 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 Youngjoon Kwon",
year = "2015",
month = "1",
day = "8",
doi = "10.1103/PhysRevD.91.011101",
language = "English",
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journal = "Physical review D: Particles and fields",
issn = "1550-7998",
publisher = "American Physical Society",
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Search for B s 0 → γ γ and a measurement of the branching fraction for B s 0 → φ γ. / (Belle Collaboration).

In: Physical Review D - Particles, Fields, Gravitation and Cosmology, Vol. 91, No. 1, 011101, 08.01.2015.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Search for B s 0 → γ γ and a measurement of the branching fraction for B s 0 → φ γ

AU - (Belle Collaboration)

AU - Dutta, D.

AU - Bhuyan, B.

AU - Abdesselam, A.

AU - Adachi, I.

AU - Aihara, H.

AU - Al Said, S.

AU - Arinstein, K.

AU - Asner, D. M.

AU - Aulchenko, V.

AU - Aushev, T.

AU - Ayad, R.

AU - Aziz, T.

AU - Bahinipati, S.

AU - Bakich, A. M.

AU - Bansal, V.

AU - Bhardwaj, V.

AU - Bobrov, A.

AU - Bonvicini, G.

AU - Bračko, M.

AU - Browder, T. E.

AU - Červenkov, D.

AU - Chen, A.

AU - Cheon, B. G.

AU - Chilikin, K.

AU - Chistov, R.

AU - Cho, K.

AU - Chobanova, V.

AU - Choi, Y.

AU - Cinabro, D.

AU - Dalseno, J.

AU - DoleŽal, Z.

AU - Drásal, Z.

AU - Drutskoy, A.

AU - Dutta, K.

AU - Eidelman, S.

AU - Farhat, H.

AU - Fast, J. E.

AU - Frost, O.

AU - Gaur, V.

AU - Ganguly, S.

AU - Garmash, A.

AU - Getzkow, D.

AU - Goh, Y. M.

AU - Golob, B.

AU - Hayashii, H.

AU - He, X. H.

AU - Hou, W. S.

AU - Iijima, T.

AU - Ishikawa, A.

AU - Kwon, Youngjoon

PY - 2015/1/8

Y1 - 2015/1/8

N2 - 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.

AB - 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.

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U2 - 10.1103/PhysRevD.91.011101

DO - 10.1103/PhysRevD.91.011101

M3 - Article

VL - 91

JO - Physical review D: Particles and fields

JF - Physical review D: Particles and fields

SN - 1550-7998

IS - 1

M1 - 011101

ER -