Observation of the Decays Λb0 →χc1pK- and Λb0 →χc2pK-

R. Aaij; B. Adeva; Z. Ajaltouni; S. Akar; F. Alessio; M. Alexander; S. Ali; G. Alkhazov; P. Alvarez Cartelle; A. A. Alves; S. Amato; S. Amerio; Y. Amhis; L. An; L. Anderlini; G. Andreassi; M. Andreotti; J. E. Andrews; R. B. Appleby; F. Archilli; P. D'Argent; J. Arnau Romeu; A. Artamonov; M. Artuso; E. Aslanides; G. Auriemma; M. Baalouch; I. Babuschkin; S. Bachmann; J. J. Back; A. Badalov; C. Baesso; S. Baker; V. Balagura; V. Coco; K. De Bruyn; M. Ferro-Luzzi; T. Ketel; J. Van Leerdam; M. Merk; C. J.G. Onderwater; G. Raven; M. Schiller; N. Serra; B. Storaci; V. Syropoulos; J. Van Tilburg; S. Tolk; P. Tsopelas; N. Tuning; (LHCb Collaboration)

doi:10.1103/PhysRevLett.119.062001

Observation of the Decays Λb0 →χc1pK- and Λb0 →χc2pK-

R. Aaij^*, B. Adeva, Z. Ajaltouni, S. Akar, F. Alessio, M. Alexander, S. Ali, G. Alkhazov, P. Alvarez Cartelle, A. A. Alves, S. Amato, S. Amerio, Y. Amhis, L. An, L. Anderlini, G. Andreassi, M. Andreotti, J. E. Andrews, R. B. Appleby, F. ArchilliP. D'Argent, J. Arnau Romeu, A. Artamonov, M. Artuso, E. Aslanides, G. Auriemma, M. Baalouch, I. Babuschkin, S. Bachmann, J. J. Back, A. Badalov, C. Baesso, S. Baker, V. Balagura, V. Coco, K. De Bruyn, M. Ferro-Luzzi, T. Ketel, J. Van Leerdam, M. Merk, C. J.G. Onderwater, G. Raven, M. Schiller, N. Serra, B. Storaci, V. Syropoulos, J. Van Tilburg, S. Tolk, P. Tsopelas, N. Tuning, (LHCb Collaboration)

^*Corresponding author for this work

(Astro)-Particles Physics

Research output: Contribution to Journal › Article › Academic › peer-review

Abstract

The first observation of the decays Λb0→χc1pK- and Λb0→χc2pK- is reported using a data sample corresponding to an integrated luminosity of 3.0 fb-1, collected by the LHCb experiment in pp collisions at center-of-mass energies of 7 and 8 TeV. The following ratios of branching fractions are measured: B(Λb0→χc1pK-)B(Λb0→J/ψpK-)=0.242±0.014±0.013±0.009,B(Λb0→χc2pK-)B(Λb0→J/ψpK-)=0.248±0.020±0.014±0.009,B(Λb0→χc2pK-)B(Λb0→χc1pK-)=1.02±0.10±0.02±0.05,where the first uncertainty is statistical, the second systematic, and the third due to the uncertainty on the branching fractions of the χc1→J/ψγ and χc2→J/ψγ decays. Using both decay modes, the mass of the Λb0 baryon is also measured to be mΛb0=5619.44±0.28±0.26 MeV/c2, where the first and second uncertainties are statistical and systematic, respectively.

Original language	English
Article number	062001
Journal	Physical Review Letters
Volume	119
Issue number	6
DOIs	https://doi.org/10.1103/PhysRevLett.119.062001
Publication status	Published - 8 Aug 2017

Funding

Funders	Funder number
Not added	1681016
Science and Technology Facilities Council	ST/J004332/1, ST/N000250/1, 1641747, ST/K003410/1, 1708182, ST/G005974/1, ST/H006737/1, LHCb, ST/N000331/1, GRIDPP, LHCb Upgrades, 1707993
Schweizerischer Nationalfonds zur Förderung der Wissenschaftlichen Forschung	166208

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Aaij, R., Adeva, B., Ajaltouni, Z., Akar, S., Alessio, F., Alexander, M., Ali, S., Alkhazov, G., Alvarez Cartelle, P., Alves, A. A., Amato, S., Amerio, S., Amhis, Y., An, L., Anderlini, L., Andreassi, G., Andreotti, M., Andrews, J. E., Appleby, R. B., ... (LHCb Collaboration) (2017). Observation of the Decays Λb0 →χc1pK- and Λb0 →χc2pK-. Physical Review Letters, 119(6), Article 062001. https://doi.org/10.1103/PhysRevLett.119.062001

@article{fc8d4fb73b114d6bb62b5a3e95352b98,

title = "Observation of the Decays Λb0 →χc1pK- and Λb0 →χc2pK-",

abstract = "The first observation of the decays Λb0→χc1pK- and Λb0→χc2pK- is reported using a data sample corresponding to an integrated luminosity of 3.0 fb-1, collected by the LHCb experiment in pp collisions at center-of-mass energies of 7 and 8 TeV. The following ratios of branching fractions are measured: B(Λb0→χc1pK-)B(Λb0→J/ψpK-)=0.242±0.014±0.013±0.009,B(Λb0→χc2pK-)B(Λb0→J/ψpK-)=0.248±0.020±0.014±0.009,B(Λb0→χc2pK-)B(Λb0→χc1pK-)=1.02±0.10±0.02±0.05,where the first uncertainty is statistical, the second systematic, and the third due to the uncertainty on the branching fractions of the χc1→J/ψγ and χc2→J/ψγ decays. Using both decay modes, the mass of the Λb0 baryon is also measured to be mΛb0=5619.44±0.28±0.26 MeV/c2, where the first and second uncertainties are statistical and systematic, respectively.",

author = "R. Aaij and B. Adeva and Z. Ajaltouni and S. Akar 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 F. Archilli and P. D'Argent and {Arnau Romeu}, J. and A. Artamonov and M. Artuso and E. Aslanides and G. Auriemma and M. Baalouch and I. Babuschkin and S. Bachmann and Back, {J. J.} and A. Badalov and C. Baesso and S. Baker and V. Balagura and V. Coco and {De Bruyn}, K. and M. Ferro-Luzzi and T. Ketel and {Van Leerdam}, J. and M. Merk and Onderwater, {C. J.G.} and G. Raven and M. Schiller and N. Serra and B. Storaci and V. Syropoulos and {Van Tilburg}, J. and S. Tolk and P. Tsopelas and N. Tuning and {(LHCb Collaboration)}",

year = "2017",

month = aug,

day = "8",

doi = "10.1103/PhysRevLett.119.062001",

language = "English",

volume = "119",

journal = "Physical Review Letters",

issn = "0031-9007",

publisher = "American Physical Society",

number = "6",

}

Aaij, R, Adeva, B, Ajaltouni, Z, Akar, S, Alessio, F, Alexander, M, Ali, S, Alkhazov, G, Alvarez Cartelle, P, Alves, AA, Amato, S, Amerio, S, Amhis, Y, An, L, Anderlini, L, Andreassi, G, Andreotti, M, Andrews, JE, Appleby, RB, Archilli, F, D'Argent, P, Arnau Romeu, J, Artamonov, A, Artuso, M, Aslanides, E, Auriemma, G, Baalouch, M, Babuschkin, I, Bachmann, S, Back, JJ, Badalov, A, Baesso, C, Baker, S, Balagura, V, Coco, V, De Bruyn, K, Ferro-Luzzi, M, Ketel, T, Van Leerdam, J, Merk, M, Onderwater, CJG, Raven, G, Schiller, M, Serra, N, Storaci, B, Syropoulos, V, Van Tilburg, J, Tolk, S, Tsopelas, P, Tuning, N & (LHCb Collaboration) 2017, 'Observation of the Decays Λb0 →χc1pK- and Λb0 →χc2pK-', Physical Review Letters, vol. 119, no. 6, 062001. https://doi.org/10.1103/PhysRevLett.119.062001

TY - JOUR

T1 - Observation of the Decays Λb0 →χc1pK- and Λb0 →χc2pK-

AU - Aaij, R.

AU - Adeva, B.

AU - Ajaltouni, Z.

AU - Akar, S.

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 - Archilli, F.

AU - D'Argent, P.

AU - Arnau Romeu, J.

AU - Artamonov, A.

AU - Artuso, M.

AU - Aslanides, E.

AU - Auriemma, G.

AU - Baalouch, M.

AU - Babuschkin, I.

AU - Bachmann, S.

AU - Back, J. J.

AU - Badalov, A.

AU - Baesso, C.

AU - Baker, S.

AU - Balagura, V.

AU - Coco, V.

AU - De Bruyn, K.

AU - Ferro-Luzzi, M.

AU - Ketel, T.

AU - Van Leerdam, J.

AU - Merk, M.

AU - Onderwater, C. J.G.

AU - Raven, G.

AU - Schiller, M.

AU - Serra, N.

AU - Storaci, B.

AU - Syropoulos, V.

AU - Van Tilburg, J.

AU - Tolk, S.

AU - Tsopelas, P.

AU - Tuning, N.

AU - (LHCb Collaboration)

PY - 2017/8/8

Y1 - 2017/8/8

N2 - The first observation of the decays Λb0→χc1pK- and Λb0→χc2pK- is reported using a data sample corresponding to an integrated luminosity of 3.0 fb-1, collected by the LHCb experiment in pp collisions at center-of-mass energies of 7 and 8 TeV. The following ratios of branching fractions are measured: B(Λb0→χc1pK-)B(Λb0→J/ψpK-)=0.242±0.014±0.013±0.009,B(Λb0→χc2pK-)B(Λb0→J/ψpK-)=0.248±0.020±0.014±0.009,B(Λb0→χc2pK-)B(Λb0→χc1pK-)=1.02±0.10±0.02±0.05,where the first uncertainty is statistical, the second systematic, and the third due to the uncertainty on the branching fractions of the χc1→J/ψγ and χc2→J/ψγ decays. Using both decay modes, the mass of the Λb0 baryon is also measured to be mΛb0=5619.44±0.28±0.26 MeV/c2, where the first and second uncertainties are statistical and systematic, respectively.

AB - The first observation of the decays Λb0→χc1pK- and Λb0→χc2pK- is reported using a data sample corresponding to an integrated luminosity of 3.0 fb-1, collected by the LHCb experiment in pp collisions at center-of-mass energies of 7 and 8 TeV. The following ratios of branching fractions are measured: B(Λb0→χc1pK-)B(Λb0→J/ψpK-)=0.242±0.014±0.013±0.009,B(Λb0→χc2pK-)B(Λb0→J/ψpK-)=0.248±0.020±0.014±0.009,B(Λb0→χc2pK-)B(Λb0→χc1pK-)=1.02±0.10±0.02±0.05,where the first uncertainty is statistical, the second systematic, and the third due to the uncertainty on the branching fractions of the χc1→J/ψγ and χc2→J/ψγ decays. Using both decay modes, the mass of the Λb0 baryon is also measured to be mΛb0=5619.44±0.28±0.26 MeV/c2, where the first and second uncertainties are statistical and systematic, respectively.

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UR - http://www.scopus.com/inward/citedby.url?scp=85027891846&partnerID=8YFLogxK

U2 - 10.1103/PhysRevLett.119.062001

DO - 10.1103/PhysRevLett.119.062001

M3 - Article

AN - SCOPUS:85027891846

SN - 0031-9007

VL - 119

JO - Physical Review Letters

JF - Physical Review Letters

IS - 6

M1 - 062001

ER -

Observation of the Decays Λb0 →χc1pK- and Λb0 →χc2pK-

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