Observation of Excited Λ0b Baryons

M. Adinolfi; John O Benton; N. H. Brook; A. Cook; M. Coombes; T. Hampson; S. T. Harnew; J. Imong; P. Naik; J. H. Rademacker; A. Solomin; J. J. Velthuis; D. Voong; LHCb Collaboration

doi:10.1103/PhysRevLett.109.172003

Observation of Excited Λ0b Baryons

M. Adinolfi, John O Benton, N. H. Brook, A. Cook, M. Coombes, T. Hampson, S. T. Harnew, J. Imong, P. Naik, J. H. Rademacker, A. Solomin, J. J. Velthuis, D. Voong, LHCb Collaboration

School of Physics

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Abstract

Using pp collision data corresponding to 1.0 fb-1 integrated luminosity collected by the LHCb detector, two narrow states are observed in the Lambda_b0pi+pi- spectrum with masses 5911.97 +- 0.12(stat) +- 0.02(syst) +- 0.66(Lambda_b0 mass) MeV/c^2 and 5919.77 +- 0.08(stat) +- 0.02(syst) +- 0.66(Lambda_b0 mass) MeV/c^2. The significances of the observations are 5.2 and 10.2 standard deviations, respectively. These states are interpreted as the orbitally-excited Lambda_b0 baryons, Lambda_b*0(5912) and Lambda_b*0(5920).

Original language	English
Article number	172003
Number of pages	8
Journal	Physical Review Letters
Volume	109
Issue number	17
DOIs	https://doi.org/10.1103/PhysRevLett.109.172003
Publication status	Published - 26 Oct 2012

Bibliographical note

Replaced by version published in Phys. Rev. Lett, modified fit with better mass resolution treatment

Keywords

hep-ex

Access to Document

10.1103/PhysRevLett.109.172003

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http://prl.aps.org/abstract/PRL/v109/i17/e172003

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Particle physics equipment grant.
Newbold, D. M. (Principal Investigator)
1/10/12 → 1/04/13
Project: Research
Consolidated Grant 2012-16
Newbold, D. M. (Principal Investigator) & Rademacker, J. H. (Researcher)
1/10/12 → 1/10/16
Project: Research
Wakeham Rebate for Rolling Grant 2010-11
Newbold, D. M. (Principal Investigator)
20/02/12 → 20/03/12
Project: Research

Cite this

@article{1c5e7a117d6249919ceec2f68e7b9cc2,

title = "Observation of Excited Λ0b Baryons",

abstract = "Using pp collision data corresponding to 1.0 fb-1 integrated luminosity collected by the LHCb detector, two narrow states are observed in the Lambda_b0pi+pi- spectrum with masses 5911.97 +- 0.12(stat) +- 0.02(syst) +- 0.66(Lambda_b0 mass) MeV/c^2 and 5919.77 +- 0.08(stat) +- 0.02(syst) +- 0.66(Lambda_b0 mass) MeV/c^2. The significances of the observations are 5.2 and 10.2 standard deviations, respectively. These states are interpreted as the orbitally-excited Lambda_b0 baryons, Lambda_b*0(5912) and Lambda_b*0(5920).",

keywords = "hep-ex",

author = "{Abellan Beteta}, C. and A. Adametz and B. Adeva and M. Adinolfi and C. Adrover and A. Affolder and Z. Ajaltouni and J. Albrecht and F. Alessio and M. Alexander and S. Ali and G. Alkhazov and {Alvarez Cartelle}, P. and {A. Alves Jr}, A. and S. Amato and Y. Amhis and J. Anderson and {B. Appleby}, R. and {Aquines Gutierrez}, O. and F. Archilli and A. Artamonov and M. Artuso and E. Aslanides and G. Auriemma and S. Bachmann and {J. Back}, J. and V. Balagura and W. Baldini and {J. Barlow}, R. and C. Barschel and S. Barsuk and W. Barter and A. Bates and C. Bauer and Th. Bauer and A. Bay and J. Beddow and I. Bediaga and Benton, {John O} and {H. Brook}, N. and A. Cook and M. Coombes and T. Hampson and {T. Harnew}, S. and J. Imong and P. Naik and {H. Rademacker}, J. and A. Solomin and {J. Velthuis}, J. and D. Voong and {LHCb Collaboration}",

note = "Replaced by version published in Phys. Rev. Lett, modified fit with better mass resolution treatment",

year = "2012",

month = oct,

day = "26",

doi = "10.1103/PhysRevLett.109.172003",

language = "English",

volume = "109",

journal = "Physical Review Letters",

issn = "0031-9007",

publisher = "American Physical Society (APS)",

number = "17",

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TY - JOUR

T1 - Observation of Excited Λ0b Baryons

AU - Abellan Beteta, C.

AU - Adametz, A.

AU - Adeva, B.

AU - Adinolfi, M.

AU - Adrover, C.

AU - Affolder, A.

AU - Ajaltouni, Z.

AU - Albrecht, J.

AU - Alessio, F.

AU - Alexander, M.

AU - Ali, S.

AU - Alkhazov, G.

AU - Alvarez Cartelle, P.

AU - A. Alves Jr, A.

AU - Amato, S.

AU - Amhis, Y.

AU - Anderson, J.

AU - B. Appleby, R.

AU - Aquines Gutierrez, O.

AU - Archilli, F.

AU - Artamonov, A.

AU - Artuso, M.

AU - Aslanides, E.

AU - Auriemma, G.

AU - Bachmann, S.

AU - J. Back, J.

AU - Balagura, V.

AU - Baldini, W.

AU - J. Barlow, R.

AU - Barschel, C.

AU - Barsuk, S.

AU - Barter, W.

AU - Bates, A.

AU - Bauer, C.

AU - Bauer, Th.

AU - Bay, A.

AU - Beddow, J.

AU - Bediaga, I.

AU - Benton, John O

AU - H. Brook, N.

AU - Cook, A.

AU - Coombes, M.

AU - Hampson, T.

AU - T. Harnew, S.

AU - Imong, J.

AU - Naik, P.

AU - H. Rademacker, J.

AU - Solomin, A.

AU - J. Velthuis, J.

AU - Voong, D.

AU - LHCb Collaboration

N1 - Replaced by version published in Phys. Rev. Lett, modified fit with better mass resolution treatment

PY - 2012/10/26

Y1 - 2012/10/26

N2 - Using pp collision data corresponding to 1.0 fb-1 integrated luminosity collected by the LHCb detector, two narrow states are observed in the Lambda_b0pi+pi- spectrum with masses 5911.97 +- 0.12(stat) +- 0.02(syst) +- 0.66(Lambda_b0 mass) MeV/c^2 and 5919.77 +- 0.08(stat) +- 0.02(syst) +- 0.66(Lambda_b0 mass) MeV/c^2. The significances of the observations are 5.2 and 10.2 standard deviations, respectively. These states are interpreted as the orbitally-excited Lambda_b0 baryons, Lambda_b*0(5912) and Lambda_b*0(5920).

AB - Using pp collision data corresponding to 1.0 fb-1 integrated luminosity collected by the LHCb detector, two narrow states are observed in the Lambda_b0pi+pi- spectrum with masses 5911.97 +- 0.12(stat) +- 0.02(syst) +- 0.66(Lambda_b0 mass) MeV/c^2 and 5919.77 +- 0.08(stat) +- 0.02(syst) +- 0.66(Lambda_b0 mass) MeV/c^2. The significances of the observations are 5.2 and 10.2 standard deviations, respectively. These states are interpreted as the orbitally-excited Lambda_b0 baryons, Lambda_b*0(5912) and Lambda_b*0(5920).

KW - hep-ex

U2 - 10.1103/PhysRevLett.109.172003

DO - 10.1103/PhysRevLett.109.172003

M3 - Article (Academic Journal)

C2 - 23215180

SN - 0031-9007

VL - 109

JO - Physical Review Letters

JF - Physical Review Letters

IS - 17

M1 - 172003

ER -

Observation of Excited Λ0b Baryons

Abstract

Bibliographical note

Keywords

Access to Document

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Projects

Particle physics equipment grant.

Consolidated Grant 2012-16

Wakeham Rebate for Rolling Grant 2010-11

Cite this