Search for the decay D0 → π+π-μ+μ-

被引：11

作者：

Aaij, R. ^{[40
]}

Adeva, B. ^{[36
]}

Adinolfi, M. ^{[45
]}

Adrover, C. ^{[6
]}

Affolder, A. ^{[51
]}

Ajaltouni, Z. ^{[5
]}

Albrecht, J. ^{[9
]}

Alessio, F. ^{[37
]}

Alexander, M. ^{[50
]}

Ali, S. ^{[40
]}

Alkhazov, G. ^{[28
]}

Alvarez Cartelle, P. ^{[36
]}

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

Amato, S. ^{[2
]}

Amerio, S. ^{[20
]}

Amhis, Y. ^{[7
]}

Anderlini, L. ^{[16
]}

Anderson, J. ^{[39
]}

Andreassen, R. ^{[56
]}

Andrews, J. E. ^{[57
]}

Appleby, R. B. ^{[53
]}

Gutierrez, O. Aquines ^{[10
]}

Archilli, E. ^{[17
]}

Artamonov, A. ^{[34
]}

Artuso, M. ^{[58
]}

Aslanides, E. ^{[6
]}

Auriemma, G. ^{[23
]}

Baalouch, M. ^{[5
]}

Bachmann, S. ^{[11
]}

Back, J. J. ^{[47
]}

Badalov, A. ^{[35
]}

Baesso, C. ^{[59
]}

Balagura, V. ^{[29
]}

Baldini, W. ^{[15
]}

Barlow, R. J. ^{[53
]}

Barsche, C. ^{[37
]}

Barsuk, S. ^{[7
]}

Barter, W. ^{[46
]}

Bauer, Th. ^{[40
]}

Bay, A. ^{[38
]}

Beddow, J. ^{[50
]}

Bedeschi, F. ^{[21
]}

Bediaga, I. ^{[1
]}

Belogurov, S. ^{[29
]}

Belous, K. ^{[34
]}

Belyaev, I. ^{[29
]}

Ben-Haim, E. ^{[8
]}

Bencivenni, G. ^{[17
]}

Benson, S. ^{[49
]}

Benton, J. ^{[45
]}

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 100084, Peoples R China

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

[5] Univ Clermont Ferrand 2, Univ Blaise Pascal, CNRS, LPC,IN2P3, Clermont Ferrand, France

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

[7] Univ Paris 11, CNRS, LAL, IN2P3, F-91405 Orsay, France

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

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

[10] Max Planck Inst Kernphys, D-69117 Heidelberg, Germany

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

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

[13] Ist Nazl Fis Nucl, Sez Bologna, I-40126 Bologna, Italy

[14] Ist Nazl Fis Nucl, Sez Cagliari, Cagliari, Italy

[15] Ist Nazl Fis Nucl, Sez Ferrara, Ferrara, Italy

[16] Ist Nazl Fis Nucl, Sez Firenze, I-50125 Florence, Italy

[17] Ist Nazl Fis Nucl, Lab Nazl Frascati, I-00044 Frascati, Italy

[18] Ist Nazl Fis Nucl, Sez Genova, I-16146 Genoa, Italy

[19] Ist Nazl Fis Nucl, Sez Milano Bicocca, I-20133 Milan, Italy

[20] Ist Nazl Fis Nucl, Sez Padova, Padua, Italy

[21] Ist Nazl Fis Nucl, Sez Pisa, Pisa, Italy

[22] Ist Nazl Fis Nucl, Sez Roma Tor Vergata, Rome, Italy

[23] Ist Nazl Fis Nucl, Sez Roma La Sapienza, Rome, Italy

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

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

[26] Natl Ctr Nucl Res NCBJ, Warsaw, Poland

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

[28] Petersburg Nucl Phys Inst, Gatchina, Russia

[29] Inst Theoret & Expt Phys, Moscow 117259, Russia

[30] Moscow State Univ SINP 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] Inst High Energy Phys, Protvino, Russia

[35] Univ Barcelona, Barcelona, Spain

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

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

[38] Ecole Polytech Fed Lausanne, Lausanne, Switzerland

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

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

[41] Vrije Univ Amsterdam, Amsterdam, Netherlands

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

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

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

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

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

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

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

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

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

来源：

PHYSICS LETTERS B | 2014年 / 728卷

基金：

美国国家科学基金会;

关键词：

D O I：

10.1016/j.physletb.2013.11.053

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

A search for the D-0 -> pi(+)pi(-)mu(+)mu(-) decay, where the muon pair does not originate from a resonance, is performed using proton-proton collision data corresponding to an integrated luminosity of 1.0 fb(-1) recorded by the LHCb experiment at a centre-of-mass energy of 7 TeV. No signal is observed and an upper limit on the relative branching fraction with respect to the resonant decay mode D-0 -> pi(+)pi(-)phi(-> mu(+)mu(-)), under the assumption of a phase-space model, is found to be B(D-0 -> pi(+)pi(-)mu(+)mu(-))/B(D-0 -> pi(+)pi(-)phi(-> mu(+)mu(-))) < 0.96 at 90% confidence level. The upper limit on the absolute branching fraction is evaluated to be B(D-0 -> pi(+)pi(-)mu(+)mu(-)) < 5.5 x 10(-7) at 90% confidence level. This is the most stringent to date. (C) 2013 The Authors. Published by Elsevier B.V. All rights reserved.

引用

页码：234 / 243

页数：10

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