First Experimental Study of Photon Polarization in Radiative Bs0 Decays

被引：16

作者：

Aaij, R. ^{[41
]}

Adeva, B. ^{[40
]}

Adinolfi, M. ^{[49
]}

Ajaltouni, Z. ^{[5
]}

Akar, S. ^{[6
]}

Albrecht, J. ^{[10
]}

Alessio, F. ^{[41
]}

Alexander, M. ^{[54
]}

Ali, S. ^{[44
]}

Alkhazov, G. ^{[31
]}

Cartelle, P. Alvarez ^{[56
]}

Alves, A. A., Jr. ^{[60
]}

Amato, S. ^{[2
]}

Amerio, S. ^{[23
]}

Amhis, Y. ^{[7
]}

An, L. ^{[42
]}

Anderlini, L. ^{[18
]}

Andreassi, G. ^{[42
]}

Andreotti, M. ^{[17
,71
]}

Andrews, J. E. ^{[61
]}

Appleby, R. B. ^{[57
]}

Archilli, F. ^{[44
]}

d'Argent, P. ^{[12
]}

Romeu, J. Arnau ^{[6
]}

Artamonov, A. ^{[38
]}

Artuso, M. ^{[62
]}

Aslanides, E. ^{[6
]}

Auriemma, G. ^{[26
]}

Baalouch, M. ^{[5
]}

Babuschkin, I. ^{[57
]}

Bachmann, S. ^{[12
]}

Back, J. J. ^{[51
]}

Badalov, A. ^{[39
]}

Baesso, C. ^{[63
]}

Baker, S. ^{[56
]}

Baldini, W. ^{[17
]}

Barlow, R. J. ^{[57
]}

Barschel, C. ^{[41
]}

Barsuk, S. ^{[7
]}

Barter, W. ^{[41
]}

Baszczyk, M. ^{[27
]}

Batozskaya, V. ^{[29
]}

Batsukh, B. ^{[62
]}

Battista, V. ^{[42
]}

Bay, A. ^{[42
]}

Beaucourt, L. ^{[4
]}

Beddow, J. ^{[54
]}

Bedeschi, F. ^{[24
]}

Bediaga, I. ^{[1
]}

Bel, L. J. ^{[44
]}

机构：

[1] Ctr Brasileiro Pesquisas Fis, Rio De Janeiro, Brazil

[2] Univ Fed Rio de Janeiro, Rio De Janeiro, Brazil

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

[4] Univ Savoie Mont Blanc, CNRS, IN2P3, LAPP, Annecy Le Vieux, France

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

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

[7] Univ Paris Sud, CNRS, IN2P3, LAL, Orsay, France

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

[9] Rhein Westfal TH Aachen, Inst Phys 1, Aachen, Germany

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

[11] Max Planck Inst Kernphys, Heidelberg, Germany

[12] Heidelberg Univ, Inst Phys, Heidelberg, Germany

[13] Univ Coll Dublin, Sch Phys, Dublin, 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, Frascati, Italy

[20] Sez INFN Genova, Genoa, Italy

[21] Sez INFN Milano Bicocca, Milan, Italy

[22] Sez INFN Milano, Milan, Italy

[23] Sez INFN Padova, Padua, Italy

[24] Sez INFN Pisa, Pisa, Italy

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

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

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

[28] AGH Univ Sci & Technol, Fac Phys & Appl Comp Sci, Krakow, Poland

[29] Natl Ctr Nucl Res, Warsaw, Poland

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

[31] Petersburg Nucl Phys Inst, Gatchina, Russia

[32] Inst Theoret & Expt Phys, Moscow, Russia

[33] Moscow State Univ SINP MSU, Inst Nucl Phys, Moscow, Russia

[34] Russian Acad Sci, Inst Nucl Res, Moscow, Russia

[35] Yandex Sch Data Anal, Moscow, Russia

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

[37] Novosibirsk State Univ, Novosibirsk, Russia

[38] Inst High Energy Phys, Protvino, Russia

[39] Univ Barcelona, ICCUB, Barcelona, Spain

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

[41] CERN, European Org Nucl Res, Geneva, Switzerland

[42] Ecole Polytech Fed Lausanne, Lausanne, Switzerland

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

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

[45] Vrije Univ Amsterdam, Amsterdam, Netherlands

[46] NSC Kharkiv Inst Phys & Technol, Kharkov, Ukraine

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

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

[49] Univ Bristol, HH Wills Phys Lab, Bristol, Avon, England

[50] Univ Cambridge, Cavendish Lab, Cambridge, England

来源：

PHYSICAL REVIEW LETTERS | 2017年 / 118卷 / 02期

关键词：

DISTRIBUTIONS; ASYMMETRIES; TOOL;

D O I：

10.1103/PhysRevLett.118.021801

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The polarization of photons produced in radiative B-s(0) decays is studied for the first time. The data are recorded by the LHCb experiment in pp collisions corresponding to an integrated luminosity of 3 fb(-1) at center-of-mass energies of 7 and 8 TeV. A time-dependent analysis of the B-s(0) ->phi gamma decay rate is conducted to determine the parameter A(Delta), which is related to the ratio of right-over left-handed photon polarization amplitudes in b -> s gamma transitions. A value of A(Delta) = -0.98(-0.52)(-0.20)(+0.46)(+0.23) is measured. This result is consistent with the standard model prediction within 2 standard deviations.

引用

页数：9

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