Observation of D0 meson decays to π+ π- μ+ μ- and K+ K- μ+ μ- final states

被引：24

作者：

Aaij, R. ^{[40
]}

Adeva, B. ^{[39
]}

Adinolfi, M. ^{[48
]}

Ajaltouni, Z. ^{[5
]}

Akar, S. ^{[59
]}

Albrecht, J. ^{[10
]}

Alessio, F. ^{[40
]}

Alexander, M. ^{[53
]}

Albero, A. Alfonso ^{[38
]}

Ali, S.

Alkhazov, G. ^{[31
]}

Cartelle, P. Alvarez ^{[55
]}

Alves, A. A., Jr. ^{[59
]}

Amato, S. ^{[2
]}

Amerio, S. ^{[23
]}

Amhis, Y. ^{[7
]}

An, L. ^{[3
]}

Anderlini, L. ^{[18
]}

Andreassi, G. ^{[41
]}

Andreotti, M. ^{[17
,79
]}

Andrews, J. E. ^{[60
]}

Appleby, R. B. ^{[56
]}

Archilli, F.

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

Romeu, J. Arnau ^{[6
]}

Artamonov, A. ^{[8
,9
,12
,29
,37
,38
,41
]}

Artuso, M. ^{[61
]}

Aslanides, E. ^{[6
]}

Auriemma, G. ^{[26
]}

Baalouch, M. ^{[5
]}

Babuschkin, I. ^{[56
]}

Bachmann, S. ^{[12
]}

Back, J. J. ^{[50
]}

Badalov, A. ^{[12
,38
,80
,87
]}

Baesso, C. ^{[62
,63
]}

Baker, S. ^{[55
]}

Balagura, V. ^{[7
,81
]}

Baldini, W. ^{[17
]}

Baranov, A. ^{[12
,35
]}

Barlow, R. J. ^{[56
]}

Barschel, C. ^{[40
]}

Barsuk, S. ^{[7
]}

Barter, W. ^{[56
]}

Baryshnikov, F. ^{[32
]}

Batozskaya, V. ^{[29
]}

Battista, V. ^{[41
]}

Bay, A. ^{[41
]}

Beaucourt, L. ^{[4
]}

Beddow, J. ^{[53
]}

Bedeschi, F. ^{[24
]}

机构：

[1] CBPF, 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 Diderot, Univ Paris 06, CNRS, IN2P3,LPNHE, Paris, France

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

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

[11] Max Planck Inst Kernphys MPIK, Heidelberg, Germany

[12] Heidelberg Univ, Phys Inst, 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] Univ INFN Ferrara, Ferrara, Italy

[18] Sez INFN Firenze, Florence, Italy

[19] Lab Nazl INFN Frascati, Frascati, Italy

[20] Sez INFN Genova, Genoa, Italy

[21] Univ INFN Milano Bicocca, Milan, Italy

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

[29] Natl Ctr Nucl Res NCBJ, 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 MV Lomonosov State Univ, Inst Nucl Phys, SINP, Moscow, Russia

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

[35] Yandex Sch Data Anal, Moscow, Russia

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

[37] Inst High Energy Phys IHEP, Protvino, Russia

[38] Univ Barcelona, ICCUB, Barcelona, Spain

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

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

[41] Ecole Polytech Fed Lausanne, Inst Phys, Lausanne, Switzerland

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

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

[44] Vrije Univ Amsterdam, Amsterdam, Netherlands

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

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

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

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

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

[50] Univ Warwick, Dept Phys, Coventry, W Midlands, England

来源：

PHYSICAL REVIEW LETTERS | 2017年 / 119卷 / 18期

关键词：

SEARCH; RARE;

D O I：

10.1103/PhysRevLett.119.181805

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The first observation of the D-0 -> pi(+) pi(-) mu(+) mu(-) and D-0 -> K+ K- mu(+) mu(-) decays is reported using a sample of proton-proton collisions collected by LHCb at a center-of-mass energy of 8 TeV, and corresponding to 2 fb(-1) of integrated luminosity. The corresponding branching fractions are measured using as normalization the decay D-0 -> K- pi(+) [mu(+) mu(-)](rho 0/omega), where the two muons are consistent with coming from the decay of a rho(0) or omega meson. The results are B(D-0 -> pi(+) pi(-) mu(+) mu(-)) = (9.64 +/- 0.48 +/- 0.51 +/- 0.97) x 10(-7) and B(D-0 -> K+ K- mu(+) mu(-)) = (1.54 +/- 0.27 +/- 0.09 +/- 0.16) x 10(-7), where the uncertainties are statistical, systematic, and due to the limited knowledge of the normalization branching fraction. The dependence of the branching fraction on the dimuon mass is also investigated.

引用

页数：10

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