Measurement of the ratio of branching fractions B(B0 → K0γ)/B(Bs0 → φγ) and the direct CP asymmetry in B0 → K0γ

被引：57

作者：

Aaij, R. ^{[39
]}

Abellan Beteta, C. ^{[1
]}

Adametz, A. ^{[12
]}

Adeva, B. ^{[35
]}

Adinolfi, M. ^{[44
]}

Adrover, C. ^{[7
]}

Affolder, A. ^{[50
]}

Ajaltouni, Z. ^{[6
]}

Albrecht, J. ^{[36
]}

Alessio, F. ^{[36
]}

Alexander, M. ^{[49
]}

Ali, S. ^{[39
]}

Alkhazov, G. ^{[28
]}

Alvarez Cartelle, P. ^{[35
]}

Alves, A. A., Jr. ^{[23
]}

Amato, S. ^{[3
]}

Amhis, Y. ^{[37
]}

Anderlini, L. ^{[18
]}

Anderson, J. ^{[38
]}

Appleby, R. B. ^{[52
]}

Gutierrez, O. Aquines ^{[11
]}

Archilli, F. ^{[19
,36
]}

Artamonov, A. ^{[34
]}

Artuso, M. ^{[54
]}

Aslanides, E. ^{[7
]}

Auriemma, G. ^{[23
]}

Bachmann, S. ^{[12
]}

Back, J. J. ^{[46
]}

Baesso, C. ^{[55
]}

Balagura, V. ^{[29
]}

Baldini, W. ^{[17
]}

Barlow, R. J. ^{[52
]}

Barschel, C. ^{[36
]}

Barsuk, S. ^{[8
]}

Barter, W. ^{[45
]}

Bates, A. ^{[49
]}

Bauer, C. ^{[11
]}

Bauer, Th. ^{[39
]}

Bay, A. ^{[37
]}

Beddow, J. ^{[49
]}

Bediaga, I. ^{[2
]}

Belogurov, S. ^{[29
]}

Belous, K. ^{[34
]}

Belyaev, I. ^{[29
]}

Ben-Haim, E. ^{[9
]}

Benayoun, M. ^{[9
]}

Bencivenni, G. ^{[19
]}

Benson, S. ^{[48
]}

Benton, J. ^{[44
]}

Berezhnoy, A. ^{[30
]}

机构：

[1] Univ Barcelona, Barcelona, Spain

[2] CBPF, Rio De Janeiro, Brazil

[3] Univ Fed Rio de Janeiro, Rio de Janeiro, Brazil

[4] Tsinghua Univ, Ctr High Energy Phys, Beijing 100084, Peoples R China

[5] Univ Savoie, LAPP, CNRS IN2P3, Annecy Le Vieux, France

[6] Univ Blaise Pascal, Clermont Univ, CNRS IN2P3, LPC, Clermont Ferrand, France

[7] Aix Marseille Univ, CPPM, CNRS IN2P3, Marseille, France

[8] Univ Paris 11, LAL, CNRS IN2P3, Orsay, France

[9] Univ Paris Diderot, LPNHE, Univ Paris 06, CNRS IN2P3, Paris, France

[10] Tech Univ Dortmund, Fak Phys, Dortmund, Germany

[11] MPIK, Heidelberg, Germany

[12] Heidelberg Univ, Inst Phys, D-6900 Heidelberg, Germany

[13] Univ Coll Dublin, Sch Phys, Dublin 2, Ireland

[14] Sez INFN Bari, Bari, Italy

[15] Sez INFN Bologna, Bologna, Italy

[16] Sez INFN Cagliari, Cagliari, Italy

[17] Sez INFN Ferrara, Ferrara, Italy

[18] Sez INFN Firenze, Florence, Italy

[19] Ist Nazl Fis Nucl, Lab Nazl, Frascati, Italy

[20] Sez INFN Genova, Genoa, Italy

[21] Sez INFN Milano Bicocca, Milan, Italy

[22] Sez INFN Roma Tor Vergata, Rome, Italy

[23] Sez INFN Roma La Sapienza, Rome, Italy

[24] Polish Acad Sci, Henryk Niewodniczanski Inst Nucl Phys, Krakow, Poland

[25] AGH Univ Sci & Technol, Krakow, Poland

[26] Soltan Inst Nucl Studies, PL-00681 Warsaw, Poland

[27] Horia Hulubei Natl Inst Phys & Nucl Engn, Bucharest, Romania

[28] PNPI, Gatchina, Russia

[29] ITEP, Moscow, Russia

[30] Moscow State Univ SNP MSU, Inst Nucl Phys, Moscow, Russia

[31] Russian Acad Sci INR RAN, Inst Nucl Res, Moscow, Russia

[32] Budker Inst Nucl Phys SB RAS, Novosibirsk, Russia

[33] Novosibirsk State Univ, Novosibirsk 630090, Russia

[34] IHEP, Protvino, Russia

[35] Univ Santiago de Compostela, Santiago De Compostela, Spain

[36] CERN, European Org Nucl Res, CH-1211 Geneva, Switzerland

[37] Ecole Polytech Fed Lausanne, CH-1015 Lausanne, Switzerland

[38] Univ Zurich, Inst Phys, Zurich, Switzerland

[39] Nikhef Natl Inst Subat Phys, Amsterdam, Netherlands

[40] Vrije Univ Amsterdam, Amsterdam, Netherlands

[41] NSC KIPT, Kharkov, Ukraine

[42] Natl Acad Sci KINR, Inst Nucl Res, Kiev, Ukraine

[43] Univ Birmingham, Birmingham, W Midlands, England

[44] Univ Bristol, HH Wills Phys Lab, Bristol BS8 1TL, Avon, England

[45] Univ Cambridge, Cavendish Lab, Cambridge CB3 0HE, England

[46] Univ Warwick, Dept Phys, Coventry CV4 7AL, W Midlands, England

[47] STFC Rutherford Appleton Lab, Didcot, Oxon, England

[48] Univ Edinburgh, Sch Phys & Astron, Edinburgh, Midlothian, Scotland

[49] Univ Glasgow, Sch Phys & Astron, Glasgow, Lanark, Scotland

[50] Univ Liverpool, Oliver Lodge Lab, Liverpool L69 3BX, Merseyside, England

来源：

NUCLEAR PHYSICS B | 2013年 / 867卷 / 01期

关键词：

DECAY;

D O I：

10.1016/j.nuclphysb.2012.09.013

中图分类号：

O412 [相对论、场论]; O572.2 [粒子物理学];

学科分类号：

摘要：

The ratio of branching fractions of the radiative B decays B-0 -> K-*0 gamma and B-s(0) -> phi gamma has been measured using an integrated luminosity of 1.0 fb(-1) of pp collision data collected by the LHCb experiment at a centre-of-mass energy of root s = 7 TeV. The value obtained is B(B-0 -> K-*0 gamma)/B(B-s(0) -> phi gamma) = 1.23 +/- 0.06 (stat.) +/- 0.04 (syst.) +/- 0.10 (f(s)/f(d)), where the first uncertainty is statistical, the second is the experimental systematic uncertainty and the third is associated with the ratio of fragmentation fractions f(s)/f(d). Using the world average value for B(B-0 -> K-*0 gamma), the branching fraction B(B-s(0) -> phi gamma) is measured to be (3.5 +/- 0.4) x 10(-5). The direct CP asymmetry in B-0 -> K-*0 gamma decays has also been measured with the same data and found to be A(CP)(B-0 -> K-*0 gamma) = (0.8 +/- 1.7 (stat.) +/- 0.9 (syst.))%. Both measurements are the most precise to date and are in agreement with the previous experimental results and theoretical expectations. (C) 2012 CERN. Published by Elsevier B.V. All rights reserved.

引用

页码：1 / 18

页数：18

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Measurement of the ratio of branching fractions B(B0 → K*0γ)/B(Bs0 → φγ) and the direct CP asymmetry in B0 → K*0γ

Measurement of the ratio of branching fractions B(B0 → K0γ)/B(Bs0 → φγ) and the direct CP asymmetry in B0 → K0γ