Observation of a Resonance in B+ → K+μ+μ- Decays at Low Recoil

被引：38

作者：

Aaij, R. ^{[41
]}

Adeva, B. ^{[37
]}

Adinolfi, M. ^{[46
]}

Adrover, C. ^{[6
]}

Affolder, A. ^{[52
]}

Ajaltouni, Z. ^{[5
]}

Albrecht, J. ^{[9
]}

Alessio, F. ^{[38
]}

Alexander, M. ^{[51
]}

Ali, S. ^{[41
]}

Alkhazov, G. ^{[29
]}

Cartelle, P. Alvarez ^{[37
]}

Alves, A. A., Jr. ^{[24
,38
]}

Amato, S. ^{[2
]}

Amerio, S. ^{[21
]}

Amhis, Y. ^{[7
]}

Anderlini, L. ^{[17
,71
]}

Anderson, J. ^{[40
]}

Andreassen, R. ^{[57
]}

Andrews, J. E. ^{[58
]}

Appleby, R. B. ^{[54
]}

Gutierrez, O. Aquines ^{[10
]}

Archilli, F. ^{[18
]}

Artamonov, A. ^{[35
]}

Artuso, M. ^{[59
]}

Aslanides, E. ^{[6
]}

Auriemma, G. ^{[24
,78
]}

Baalouch, M. ^{[5
]}

Bachmann, S. ^{[11
]}

Back, J. J. ^{[48
]}

Baesso, C. ^{[60
,61
]}

Balagura, V. ^{[30
]}

Baldini, W. ^{[16
]}

Barlow, R. J. ^{[54
]}

Barschel, C. ^{[38
]}

Barsuk, S. ^{[7
]}

Barter, W. ^{[47
]}

Bauer, Th. ^{[41
]}

Bay, A. ^{[39
]}

Beddow, J. ^{[51
]}

Bedeschi, F. ^{[22
]}

Bediaga, I. ^{[1
]}

Belogurov, S. ^{[30
]}

Belous, K. ^{[35
]}

Belyaev, I. ^{[30
]}

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

Bencivenni, G. ^{[18
]}

Benson, S. ^{[50
]}

Benton, J. ^{[46
]}

Berezhnoy, A. ^{[31
]}

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 Blaise Pascal, Clermont Univ, CNRS IN2P3, LPC, Clermont Ferrand, France

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

[7] Univ Paris 11, CNRS, IN2P3, LAL, 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 Bari, I-70126 Bari, Italy

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

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

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

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

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

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

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

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

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

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

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

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

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

[27] NCBJ, Warsaw, Poland

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

[29] PNPI, Gatchina, Russia

[30] ITEP, Moscow, Russia

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

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

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

[34] Novosibirsk State Univ, Novosibirsk 630090, Russia

[35] IHEP, Protvino, Russia

[36] Univ Barcelona, Barcelona, Spain

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

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

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

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

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

[42] Vrije Univ Amsterdam, Amsterdam, Netherlands

[43] NSC KIPT, Kharkov, Ukraine

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

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

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

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

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

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

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

来源：

PHYSICAL REVIEW LETTERS | 2013年 / 111卷 / 11期

关键词：

D O I：

10.1103/PhysRevLett.111.112003

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

A broad peaking structure is observed in the dimuon spectrum of B+ -> K+mu(+)mu(-) decays in the kinematic region where the kaon has a low recoil against the dimuon system. The structure is consistent with interference between the B+ -> K+mu(+)mu(-) decay and a resonance and has a statistical significance exceeding six standard deviations. The mean and width of the resonance are measured to be 4191(-8)(+9) MeV/c(2) and 65(-16)(+22) MeV/c(2), respectively, where the uncertainties include statistical and systematic contributions. These measurements are compatible with the properties of the psi(4160) meson. First observations of both the decay B+ -> psi(4160)K+ and the subsequent decay psi(4160) -> mu(+)mu(-) are reported. The resonant decay and the interference contribution make up 20% of the yield for dimuon masses above 3770 MeV/c(2). This contribution is larger than theoretical estimates.

引用

页数：8

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