Model-Independent Evidence for J /ψp Contributions to Λb0 →j /ψpK- Decays

LHCb Collaboration

doi:10.1103/PhysRevLett.117.082002

Model-Independent Evidence for J /ψp Contributions to Λb0 →j /ψpK- Decays

LHCb Collaboration

Department of Physics

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90 Scopus citations

Abstract

The data sample of Λb0→J/ψpK- decays acquired with the LHCb detector from 7 and 8 TeV pp collisions, corresponding to an integrated luminosity of 3 fb-1, is inspected for the presence of J/ψp or J/ψK- contributions with minimal assumptions about K-p contributions. It is demonstrated at more than nine standard deviations that Λb0→J/ψpK- decays cannot be described with K-p contributions alone, and that J/ψp contributions play a dominant role in this incompatibility. These model-independent results support the previously obtained model-dependent evidence for Pc+→J/ψp charmonium-pentaquark states in the same data sample.

Original language	English (US)
Article number	082002
Journal	Physical Review Letters
Volume	117
Issue number	8
DOIs	https://doi.org/10.1103/PhysRevLett.117.082002
State	Published - Aug 18 2016

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ASJC Scopus subject areas

Physics and Astronomy(all)

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LHCb Collaboration (2016). Model-Independent Evidence for J /ψp Contributions to Λb0 →j /ψpK- Decays. Physical Review Letters, 117(8), [082002]. https://doi.org/10.1103/PhysRevLett.117.082002

@article{80f2bc667cf2468a86ad52d6febf03d9,

title = "Model-Independent Evidence for J /ψp Contributions to Λb0 →j /ψpK- Decays",

abstract = "The data sample of Λb0→J/ψpK- decays acquired with the LHCb detector from 7 and 8 TeV pp collisions, corresponding to an integrated luminosity of 3 fb-1, is inspected for the presence of J/ψp or J/ψK- contributions with minimal assumptions about K-p contributions. It is demonstrated at more than nine standard deviations that Λb0→J/ψpK- decays cannot be described with K-p contributions alone, and that J/ψp contributions play a dominant role in this incompatibility. These model-independent results support the previously obtained model-dependent evidence for Pc+→J/ψp charmonium-pentaquark states in the same data sample.",

author = "{LHCb Collaboration} and R. Aaij and {Abell{\'a}n Beteta}, C. and B. Adeva and M. Adinolfi and Z. Ajaltouni and S. Akar and J. Albrecht and F. Alessio and M. Alexander and S. Ali and G. Alkhazov and {Alvarez Cartelle}, P. and Alves, {A. A.} and S. Amato and S. Amerio and Y. Amhis and L. An and L. Anderlini and G. Andreassi and M. Andreotti and Andrews, {J. E.} and Appleby, {R. B.} and {Aquines Gutierrez}, O. and F. Archilli and P. D'Argent and A. Artamonov and M. Artuso and E. Aslanides and G. Auriemma and M. Baalouch and S. Bachmann and Back, {J. J.} and A. Badalov and C. Baesso and S. Baker and W. Baldini and Barlow, {R. J.} and C. Barschel and S. Barsuk and W. Barter and V. Batozskaya and V. Battista and A. Bay and L. Beaucourt and J. Beddow and F. Bedeschi and I. Bediaga and Bel, {L. J.} and T. Skwarnicki and S. Stone",

year = "2016",

month = aug,

day = "18",

doi = "10.1103/PhysRevLett.117.082002",

language = "English (US)",

volume = "117",

journal = "Physical Review Letters",

issn = "0031-9007",

publisher = "American Physical Society",

number = "8",

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TY - JOUR

T1 - Model-Independent Evidence for J /ψp Contributions to Λb0 →j /ψpK- Decays

AU - LHCb Collaboration

AU - Aaij, R.

AU - Abellán Beteta, C.

AU - Adeva, B.

AU - Adinolfi, M.

AU - Ajaltouni, Z.

AU - Akar, S.

AU - Albrecht, J.

AU - Alessio, F.

AU - Alexander, M.

AU - Ali, S.

AU - Alkhazov, G.

AU - Alvarez Cartelle, P.

AU - Alves, A. A.

AU - Amato, S.

AU - Amerio, S.

AU - Amhis, Y.

AU - An, L.

AU - Anderlini, L.

AU - Andreassi, G.

AU - Andreotti, M.

AU - Andrews, J. E.

AU - Appleby, R. B.

AU - Aquines Gutierrez, O.

AU - Archilli, F.

AU - D'Argent, P.

AU - Artamonov, A.

AU - Artuso, M.

AU - Aslanides, E.

AU - Auriemma, G.

AU - Baalouch, M.

AU - Bachmann, S.

AU - Back, J. J.

AU - Badalov, A.

AU - Baesso, C.

AU - Baker, S.

AU - Baldini, W.

AU - Barlow, R. J.

AU - Barschel, C.

AU - Barsuk, S.

AU - Barter, W.

AU - Batozskaya, V.

AU - Battista, V.

AU - Bay, A.

AU - Beaucourt, L.

AU - Beddow, J.

AU - Bedeschi, F.

AU - Bediaga, I.

AU - Bel, L. J.

AU - Skwarnicki, T.

AU - Stone, S.

PY - 2016/8/18

Y1 - 2016/8/18

N2 - The data sample of Λb0→J/ψpK- decays acquired with the LHCb detector from 7 and 8 TeV pp collisions, corresponding to an integrated luminosity of 3 fb-1, is inspected for the presence of J/ψp or J/ψK- contributions with minimal assumptions about K-p contributions. It is demonstrated at more than nine standard deviations that Λb0→J/ψpK- decays cannot be described with K-p contributions alone, and that J/ψp contributions play a dominant role in this incompatibility. These model-independent results support the previously obtained model-dependent evidence for Pc+→J/ψp charmonium-pentaquark states in the same data sample.

AB - The data sample of Λb0→J/ψpK- decays acquired with the LHCb detector from 7 and 8 TeV pp collisions, corresponding to an integrated luminosity of 3 fb-1, is inspected for the presence of J/ψp or J/ψK- contributions with minimal assumptions about K-p contributions. It is demonstrated at more than nine standard deviations that Λb0→J/ψpK- decays cannot be described with K-p contributions alone, and that J/ψp contributions play a dominant role in this incompatibility. These model-independent results support the previously obtained model-dependent evidence for Pc+→J/ψp charmonium-pentaquark states in the same data sample.

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U2 - 10.1103/PhysRevLett.117.082002

DO - 10.1103/PhysRevLett.117.082002

M3 - Article

AN - SCOPUS:84984939496

VL - 117

JO - Physical Review Letters

JF - Physical Review Letters

SN - 0031-9007

IS - 8

M1 - 082002

ER -

Access to Document

10.1103/PhysRevLett.117.082002