Observation of a new baryon state in the Λb0π+π- mass spectrum

被引：0

作者：

Aaij, R. ^{[28
]}

Beteta, C. Abellan ^{[46
]}

Adeva, B. ^{[43
]}

Adinolfi, M. ^{[50
]}

Aidala, C. A. ^{[77
]}

Ajaltouni, Z. ^{[6
]}

Akar, S. ^{[61
]}

Albicocco, P. ^{[19
]}

Albrecht, J. ^{[11
]}

Alessio, F. ^{[44
]}

Alexander, M. ^{[55
]}

Albero, A. Alfonso ^{[42
]}

Alkhazov, G. ^{[34
]}

Cartelle, P. Alvarez ^{[57
]}

Alves, A. A., Jr. ^{[43
]}

Amato, S. ^{[2
]}

Amerio, S. ^{[24
]}

Amhis, Y. ^{[8
]}

An, L. ^{[18
]}

Anderlini, L. ^{[18
]}

Andreassi, G. ^{[45
]}

Andreotti, M. ^{[17
]}

Andrews, J. E. ^{[62
]}

Archilli, F. ^{[28
]}

d'Argent, P. ^{[13
]}

Romeu, J. Arnau ^{[7
]}

Artamonov, A. ^{[41
]}

Artuso, M. ^{[63
]}

Arzymatov, K. ^{[38
]}

Aslanides, E. ^{[7
]}

Atzeni, M. ^{[46
]}

Audurier, B. ^{[23
]}

Bachmann, S. ^{[13
]}

Back, J. J. ^{[52
]}

Baker, S. ^{[57
]}

Balagura, V. ^{[8
,80
]}

Baldini, W. ^{[17
]}

Baranov, A. ^{[38
]}

Barlow, R. J. ^{[58
]}

Barrand, G. C. ^{[8
]}

Barsuk, S. ^{[8
]}

Barter, W. ^{[58
]}

Bartolini, M. ^{[20
]}

baryshnikov, F. ^{[74
]}

Batozskaya, V. ^{[32
]}

Batsukh, B. ^{[63
]}

Battig, A. ^{[11
]}

Battista, V. ^{[45
]}

Bay, A. ^{[45
]}

Beddow, J. ^{[55
]}

机构：

[1] CBPF, Rio De Janeiro, Brazil

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

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

[4] Ihep, Beijing, Peoples R China

[5] Univ Savoie Mont Blanc, Univ Grenoble Alpes, CNRS, IN2P3,LAPP, Annecy, France

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

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

[8] Univ Paris Saclay, Univ Paris Sud, LAL, CNRS,IN2P3, Orsay, France

[9] Sorbonne Univ, Paris Diderot Sorbonne Paris Cite, LPNHE, CNRS,IN2P3, Paris, France

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

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

[12] Max Planck Inst Kernphys, Heidelberg, Germany

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

[14] Univ Coll Dublin, Sch Phys, Dublin, Ireland

[15] INFN, Sez Bari, Bari, Italy

[16] INFN, Sez Bologna, Bologna, Italy

[17] INFN, Sez Ferrara, Ferrara, Italy

[18] INFN, Sez Firenze, Florence, Italy

[19] INFN, Lab Nazl Frascati, Frascati, Italy

[20] INFN, Sez Genova, Genoa, Italy

[21] INFN, Sez Milano Bicocca, Milan, Italy

[22] INFN, Sez Milano, Milan, Italy

[23] INFN, Sez Cagliari, Monserrato, Italy

[24] INFN, Sez Padova, Padua, Italy

[25] INFN, Sez Pisa, Pisa, Italy

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

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

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

[29] Vrije Univ Amsterdam, Amsterdam, Netherlands

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

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

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

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

[34] PNPI, Gatchina, Russia

[35] ITEP, Moscow, Russia

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

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

[38] Yandex Sch Data Anal, Moscow, Russia

[39] Natl Res Univ Higher Sch Econ, Moscow, Russia

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

[41] IHEP, Protvino, Russia

[42] Univ Barcelona, ICCUB, Barcelona, Spain

[43] Univ Santiago de Compostela, IGFAE, Santiago De Compostela, Spain

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

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

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

[47] NSC KIPT, Kharkiv, Ukraine

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

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

[50] Univ Bristol, HH Wills Phys Lab, Bristol, RI USA

来源：

JOURNAL OF HIGH ENERGY PHYSICS | 2020年 / 06期

关键词：

B physics; Hadron-Hadron scattering (experiments); Heavy quark production; Spectroscopy; DECAY; MODEL; TOOL;

D O I：

10.1007/JHEP06(2020)136

中图分类号：

O412 [相对论、场论]; O572.2 [粒子物理学];

学科分类号：

摘要：

A new baryon state is observed in the Lambda(0)(b)pi(+)pi(-) mass spectrum with high significance using a data sample of pp collisions, collected with the LHCb detector at centre-of-mass energies root s = 7, 8 and 13 TeV, corresponding to an integrated luminosity of 9 fb(-1). The mass and natural width of the new state are measured to be m = 6072.3 +/- 2.9 +/- 0.6 +/- 0.2 MeV, Gamma = 72 +/- 11 +/- 2 MeV, where the first uncertainty is statistical and the second systematic. The third uncertainty for the mass is due to imprecise knowledge of the Lambda(0)(b) baryon mass. The new state is consistent with the first radial excitation of the Lambda(0)(b) baryon, the Lambda(b)(2S)(0) resonance. Updated measurements of the masses and the upper limits on the natural widths of the previously observed Lambda(b)(5912)(0) and Lambda(b)(5920)(0) states are also reported.

引用

页数：26

共 61 条

[21]

Bukin A.D, ARXIV07114449

[22]

CAPSTICK S, 1985, AIP CONF PROC, P267, DOI 10.1063/1.35361

[23]

CDF collaboration, 2012, PHYS REV D, V85

[24]

CDF collaboration, 2007, PHYS REV LETT, V99

[25]

CDF COLLABORATION, 2013, Phys. Rev. D, V88

[26] Interpretation of the observed Λb(6146)0 and Λb(6152)0 states as 1D bottom baryons [J].

Chen, Bing ;

Luo, Si-Qiang ;

Liu, Xiang ;

Matsuki, Takayuki .

PHYSICAL REVIEW D, 2019, 100 (09)

[27] Investigation of ΛQ and ΞQ baryons in the heavy quark-light diquark picture [J].

Chen, Bing ;

Wei, Ke-Wei ;

Zhang, Ailin .

EUROPEAN PHYSICAL JOURNAL A, 2015, 51 (07)

[28]

CMS collaboration, 2020, PHYS LETT B, V803

[29] Improved performance of the LHCb Outer Tracker in LHC Run 2 [J].

d'Argent, P. ;

Dufour, L. ;

Grillo, L. ;

de Vries, J. A. ;

Ukleja, A. ;

Aaij, R. ;

Archilli, F. ;

Bachmann, S. ;

Berninghoff, D. ;

Birnkraut, A. ;

Blouw, J. ;

De Cian, M. ;

Ciezarek, G. ;

Faerber, C. ;

Demmer, M. ;

Dettori, F. ;

Gersabeck, E. ;

Grabowski, J. ;

Hulsbergen, W. D. ;

Khanji, B. ;

Kolpin, M. ;

Kucharczyk, M. ;

Malecki, B. P. ;

Merk, M. ;

Mulder, M. ;

Mueller, J. ;

Mueller, V. ;

Pellegrino, A. ;

Pikies, M. ;

Rachwal, B. ;

Schmelzer, T. ;

Spaan, B. ;

Szczekowski, M. ;

van Tilburg, J. ;

Tolk, S. ;

Tuning, N. ;

Uwer, U. ;

Wishahi, J. ;

Witek, M. .

JOURNAL OF INSTRUMENTATION, 2017, 12

[30] Spectroscopy and Regge trajectories of heavy baryons in the relativistic quark-diquark picture [J].

Ebert, D. ;

Faustov, R. N. ;

Galkin, V. O. .

PHYSICAL REVIEW D, 2011, 84 (01)

← 1 2 3 4 5 6 7 →