Study of the B- → Λc+(Λ)over-barc-K- decay

被引：10

作者：

Aaij, R. ^{[74
,75
]}

Abdelmotteleb, A. S. W. ^{[51
,64
]}

Beteta, C. Abellan ^{[45
]}

Abudinen, F. ^{[51
,64
]}

Ackernley, T. ^{[55
]}

Adeva, B. ^{[41
]}

Adinolfi, M. ^{[49
]}

Afsharnia, H. ^{[9
]}

Agapopoulou, C. ^{[13
,70
]}

Aidala, C. A. ^{[78
]}

Aiola, S. ^{[25
]}

Ajaltouni, Z. ^{[9
]}

Akar, S. ^{[60
]}

Akiba, K. ^{[33
,74
,75
]}

Albrecht, J. ^{[15
]}

Alessio, F. ^{[43
,72
]}

Alexander, M. ^{[54
,77
]}

Alfonso Albero, A. ^{[40
,76
]}

Aliouche, Z. ^{[57
]}

Cartelle, P. Alvarez ^{[50
]}

Amalric, R. ^{[13
,70
]}

Amato, S. ^{[2
,65
]}

Amey, J. L. ^{[49
]}

Amhis, Y. ^{[11
,43
,72
]}

An, L. ^{[43
,72
]}

Anderlini, L. ^{[22
]}

Andersson, M. ^{[45
]}

Andreianov, A. ^{[39
]}

Andreotti, M. ^{[21
,73
]}

Andreou, D. ^{[63
,78
]}

Ao, D. ^{[6
]}

Archilli, F. ^{[17
,71
]}

Artamonov, A. ^{[39
]}

Artuso, M. ^{[63
,78
]}

Aslanides, E. ^{[10
]}

Atzeni, M. ^{[45
]}

Audurier, B. ^{[12
]}

Bachmann, S. ^{[17
,71
]}

Bachmayer, M. ^{[44
]}

Back, J. J. ^{[51
,64
]}

Bailly-reyre, A. ^{[13
,70
]}

Baladron Rodriguez, P. ^{[41
]}

Balagura, V. ^{[12
]}

Baldini, W. ^{[21
,73
]}

Baptista de Souza Leite, J. ^{[1
]}

Barbetti, M. ^{[22
,88
]}

Barlow, R. J. ^{[57
]}

Barsuk, S. ^{[11
]}

Barter, W. ^{[56
]}

Bartolini, M. ^{[50
]}

机构：

[1] Ctr Brasileiro Pesquisas Fis CBPF, Rio De Janeiro, Brazil

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

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

[4] Inst High Energy Phys IHEP, Beijing, Peoples R China

[5] Peking Univ, Sch Phys State Key Lab Nucl Phys & Technol, Beijing, Peoples R China

[6] Univ Chinese Acad Sci, Beijing, Peoples R China

[7] Cent China Normal Univ, Inst Particle Phys, Wuhan, Hubei, Peoples R China

[8] Univ Savoie Mont Blanc, CNRS, IN2P3, LAPP, Annecy, France

[9] Univ Clermont Auvergne, LPC, CNRS, IN2P3, Clermont Ferrand, France

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

[11] Univ Paris Saclay, CNRS, IN2P3, IJCLab, Orsay, France

[12] Ecole Polytech, Inst Polytech Paris, Lab Leprince Ringuet, CNRS,IN2P3, Palaiseau, France

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

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

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

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

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

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

[19] INFN, Sez Bari, Bari, Italy

[20] INFN, Sez Bologna, Bologna, Italy

[21] INFN, Sez Ferrara, Ferrara, Italy

[22] INFN, Sez Firenze, Florence, Italy

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

[24] INFN, Sez Genova, Genoa, Italy

[25] INFN, Sez Milano, Milan, Italy

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

[27] INFN, Sez Cagliari, Monserrato, Italy

[28] Univ Padua, Padua, Italy

[29] INFN, Padua, Italy

[30] INFN, Sez Pisa, Pisa, Italy

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

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

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

[34] Vrije Univ Amsterdam, Amsterdam, Netherlands

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

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

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

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

[39] CERN, Geneva, Switzerland

[40] Univ Barcelona, ICCUB, Barcelona, Spain

[41] Univ Santiago de Compostela, Inst Galego Fis Altas Enerxias IGFAE, Santiago De Compostela, Spain

[42] Ctr Mixto Univ Valencia, Inst Fis Corpuscular, CSIC, Valencia, Spain

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

[44] Ecole Polytech Fed Lausanne EPFL, Inst Phys, Lausanne, Switzerland

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

[46] NSC Kharkiv Inst Phys & Technol NSC KIPT, Kharkiv, 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 D | 2023年 / 108卷 / 01期

关键词：

D O I：

10.1103/PhysRevD.108.012020

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

The decay B- -> Lambda(+)(c)(Lambda) over bar K--(c)- is studied in proton-proton collisions at a center-of-mass energy of root s = 13 TeV using data corresponding to an integrated luminosity of 5 fb(-1) collected by the LHCb experiment. In the Lambda K-+(c)- system, the Xi(c)(2930)(0) state observed at the BABAR and Belle experiments is resolved into two narrower states, Xi(c)(2923)(0) and Xi(c)(2939)(0), whose masses and widths are measured to be m(Xi(c)(2930)(0) = 2924.5 +/- 0.4 +/- 1.1 Mev, m Xi(c)(2930)(0)) = 2938.5 +/- 0.9 +/- 2.3 Mev, Gamma(Xi(c)(2930)(0)) = 4.8 +/- 0.9 +/- 1.5 MeV, Gamma(Xi(c)(2930)(0) - 11.0 +/- 1.9 +/- 7.5 MeV, where the first uncertainties are statistical and the second systematic. The results are consistent with a previous LHCb measurement using a prompt Lambda K-+(c)- sample. Evidence of a new Xi(c)(2930)(0) state is found with a local significance of 3.8 sigma, whose mass and width are measured to be 2881.8 +/- 3.1 +/- 8.5 MeV and 12.4 +/- 5.3 +/- 5.8 MeV, respectively. In addition, evidence of a new decay mode Xi(c)(2930)(0) -> Lambda K-+(c) is found with a significance of 3.7 sigma. The relative branching fraction of B- -> Lambda(+)(c)(Lambda) over bar K--(c)- with respect to the B- -> D+D-K- decay is measured to be 2.36 +/- 0.11 +/- 0.22 +/- 0.25, where the first uncertainty is statistical, the second systematic and the third originates from the branching fractions of charm hadron decays.

引用

页数：15

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