Evidence for Exotic Hadron Contributions to Λb0 → J/ψpπ- Decays

被引：109

作者：

Aaij, R. ^{[40
]}

Beteta, C. Abellan ^{[42
]}

Adeva, B. ^{[39
]}

Adinolfi, M. ^{[49
]}

Ajaltouni, Z. ^{[5
]}

Akar, S. ^{[6
]}

Albrecht, J. ^{[10
]}

Alessio, F. ^{[40
]}

Alexander, M.

Ali, S. ^{[43
]}

Alkhazov, G. ^{[31
]}

Cartelle, P. Alvarez ^{[55
]}

Alves, A. A., Jr. ^{[58
]}

Amato, S. ^{[2
]}

Amerio, S. ^{[23
]}

Amhis, Y. ^{[7
]}

An, L. ^{[41
]}

Anderlini, L. ^{[18
]}

Andreassi, G. ^{[41
]}

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

Andrews, J. E. ^{[59
]}

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

Gutierrez, O. Aquines ^{[11
]}

Archilli, F. ^{[1
]}

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

Romeu, J. Arnau ^{[6
]}

Artamonov, A.

Artuso, M. ^{[60
]}

Aslanides, E. ^{[6
]}

Auriemma, G. ^{[26
,80
]}

Baalouch, M. ^{[5
]}

Bachmann, S. ^{[12
]}

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

Badalov, A. ^{[38
]}

Baesso, C. ^{[61
,62
]}

Baldini, W. ^{[17
]}

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

Barschel, C. ^{[40
]}

Barsuk, S. ^{[7
]}

Barter, W. ^{[40
]}

Batozskaya, V. ^{[29
]}

Battista, V. ^{[41
]}

Bay, A. ^{[41
]}

Beaucourt, L. ^{[4
]}

Beddow, J.

Bedeschi, F. ^{[24
]}

Bediaga, I. ^{[1
]}

Bel, L. J. ^{[43
]}

Bellee, V. ^{[41
]}

Belloli, N. ^{[81
]}

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, 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 Sud, LAL, CNRS, IN2P3, Orsay, France

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

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

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

[11] 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] Sez INFN Ferrara, Ferrara, Italy

[18] Sez INFN Firenze, Florence, Italy

[19] Lab Nazl INFN 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 Sapienza, Rome, Italy

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

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

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

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

[31] PNPI, Gatchina, Russia

[32] ITEP, Moscow, Russia

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

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

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

[36] Novosibirsk State Univ, Novosibirsk, Russia

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

[38] Univ Barcelona, Barcelona, Spain

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

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

[41] Ecole Polytech Fed Lausanne, Lausanne, Switzerland

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

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

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

[45] Vrije Univ Amsterdam, Amsterdam, Netherlands

[46] NSC KIPT, Kharkov, Ukraine

[47] Natl Acad Sci KINR, Inst Nucl Res, 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 | 2016年 / 117卷 / 08期

关键词：

BARYON RESONANCES; QUARK-MODEL;

D O I：

10.1103/PhysRevLett.117.082003

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

A full amplitude analysis of Lambda(0)(b) -> J/psi pi(-) decays is performed with a data sample acquired with the LHCb detector from 7 and 8 TeV pp collisions, corresponding to an integrated luminosity of 3 fb(-1). A significantly better description of the data is achieved when, in addition to the previously observed nucleon excitations N -> p pi(-), either the P-c(43800)(+) and P-c(4450)(+) -> J/psi p states, previously observed in Lambda(0)(b) -> J/psi pK(-) decays, or the Z(c)(4200)(-) -> J/psi pi(-) state, previously reported in B-0 -> J/psi K+pi(-) decays, or all three, are included in the amplitude models. The data support a model containing all three exotic states, with a significance of more than three standard deviations. Within uncertainties, the data are consistent with the P-c(4380)(+) and P-c(4 450)(+) production rates expected from their previous observation taking account of Cabibbo suppression.

引用

页数：10

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