First Observation of the Rare Purely Baryonic Decay B0→pp.

M. Adinolfi; M. Alexander; S. Ali; A. A. Alves; J. E. Andrews; R. J. Barlow; S. Benson; T. Blake; E. Bowen; E. Buchanan; C. Burr; S. Chen; S. F. Cheung; P. E.L. Clarke; J. Cogan; V. Cogoni; P. Collins; G. Coombs; J. Dalseno; A. Davis; L. De Paula; L. Douglas; H. M. Evans; T. Evans; D. Ferguson; M. Frank; J. Fu; V. Gibson; X. Han; S. T. Harnew; J. Harrison; M. Hatch; J. He; L. Henry; D. Hill; D. Johnson; J. M. Kariuki; U. Marconi; P. Naik; K. Petridis; G. J. Pomery; C. Prouve; R. Quagliani; J. H. Rademacker; V. Rives Molina; D. M. Saunders; N. Skidmore; J. J. Velthuis; C. Wallace; F. F. Wilson; LHCb Collaboration

doi:10.1103/PhysRevLett.119.232001

First Observation of the Rare Purely Baryonic Decay B⁰→pp^.

M. Adinolfi, M. Alexander, S. Ali, A. A. Alves, J. E. Andrews, R. J. Barlow, S. Benson, T. Blake, E. Bowen, E. Buchanan, C. Burr, S. Chen, S. F. Cheung, P. E.L. Clarke, J. Cogan, V. Cogoni, P. Collins, G. Coombs, J. Dalseno, A. DavisL. De Paula, L. Douglas, H. M. Evans, T. Evans, D. Ferguson, M. Frank, J. Fu, V. Gibson, X. Han, S. T. Harnew, J. Harrison, M. Hatch, J. He, L. Henry, D. Hill, D. Johnson, J. M. Kariuki, U. Marconi, P. Naik, K. Petridis, G. J. Pomery, C. Prouve, R. Quagliani, J. H. Rademacker, V. Rives Molina, D. M. Saunders, N. Skidmore, J. J. Velthuis, C. Wallace, F. F. Wilson, LHCb Collaboration

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Abstract

The first observation of the decay of a B0 meson to a purely baryonic final state, B0→pp, is reported. The proton-proton collision data sample used was collected with the LHCb experiment at center-of-mass energies of 7 and 8 TeV and corresponds to an integrated luminosity of 3.0 fb-1. The branching fraction is determined to be B(B0→pp)=(1.25±0.27±0.18)×10-8, where the first uncertainty is statistical and the second systematic. The decay mode B0→pp is the rarest decay of the B0 meson observed to date. The decay Bs0→pp is also investigated. No signal is seen and the upper limit B(Bs0→pp)<1.5×10-8 at 90% confidence level is set on the branching fraction.

Original language	English
Article number	232001
Journal	Physical Review Letters
Volume	119
Issue number	23
DOIs	https://doi.org/10.1103/PhysRevLett.119.232001
Publication status	Published - 4 Dec 2017

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Adinolfi, M., Alexander, M., Ali, S., Alves, A. A., Andrews, J. E., Barlow, R. J., Benson, S., Blake, T., Bowen, E., Buchanan, E., Burr, C., Chen, S., Cheung, S. F., Clarke, P. E. L., Cogan, J., Cogoni, V., Collins, P., Coombs, G., Dalseno, J., ... LHCb Collaboration (2017). First Observation of the Rare Purely Baryonic Decay B⁰→pp^. Physical Review Letters, 119(23), Article 232001. https://doi.org/10.1103/PhysRevLett.119.232001

@article{d1177555859641d3b82a857d096cc4a4,

title = "First Observation of the Rare Purely Baryonic Decay B0→pp.",

abstract = "The first observation of the decay of a B0 meson to a purely baryonic final state, B0→pp, is reported. The proton-proton collision data sample used was collected with the LHCb experiment at center-of-mass energies of 7 and 8 TeV and corresponds to an integrated luminosity of 3.0 fb-1. The branching fraction is determined to be B(B0→pp)=(1.25±0.27±0.18)×10-8, where the first uncertainty is statistical and the second systematic. The decay mode B0→pp is the rarest decay of the B0 meson observed to date. The decay Bs0→pp is also investigated. No signal is seen and the upper limit B(Bs0→pp)<1.5×10-8 at 90% confidence level is set on the branching fraction.",

author = "M. Adinolfi and M. Alexander and S. Ali and Alves, {A. A.} and Andrews, {J. E.} and Barlow, {R. J.} and S. Benson and T. Blake and E. Bowen and E. Buchanan and C. Burr and S. Chen and Cheung, {S. F.} and Clarke, {P. E.L.} and J. Cogan and V. Cogoni and P. Collins and G. Coombs and J. Dalseno and A. Davis and {De Paula}, L. and L. Douglas and Evans, {H. M.} and T. Evans and D. Ferguson and M. Frank and J. Fu and V. Gibson and X. Han and Harnew, {S. T.} and J. Harrison and M. Hatch and J. He and L. Henry and D. Hill and D. Johnson and Kariuki, {J. M.} and U. Marconi and P. Naik and K. Petridis and Pomery, {G. J.} and C. Prouve and R. Quagliani and Rademacker, {J. H.} and {Rives Molina}, V. and Saunders, {D. M.} and N. Skidmore and Velthuis, {J. J.} and C. Wallace and Wilson, {F. F.} and {LHCb Collaboration}",

year = "2017",

month = dec,

day = "4",

doi = "10.1103/PhysRevLett.119.232001",

language = "English",

volume = "119",

journal = "Physical Review Letters",

issn = "0031-9007",

publisher = "American Physical Society (APS)",

number = "23",

}

Adinolfi, M, Alexander, M, Ali, S, Alves, AA, Andrews, JE, Barlow, RJ, Benson, S, Blake, T, Bowen, E, Buchanan, E, Burr, C, Chen, S, Cheung, SF, Clarke, PEL, Cogan, J, Cogoni, V, Collins, P, Coombs, G, Dalseno, J, Davis, A, De Paula, L, Douglas, L, Evans, HM, Evans, T, Ferguson, D, Frank, M, Fu, J, Gibson, V, Han, X, Harnew, ST, Harrison, J, Hatch, M, He, J, Henry, L, Hill, D, Johnson, D, Kariuki, JM, Marconi, U, Naik, P, Petridis, K, Pomery, GJ, Prouve, C, Quagliani, R, Rademacker, JH, Rives Molina, V, Saunders, DM, Skidmore, N, Velthuis, JJ, Wallace, C, Wilson, FF & LHCb Collaboration 2017, 'First Observation of the Rare Purely Baryonic Decay B⁰→pp^.', Physical Review Letters, vol. 119, no. 23, 232001. https://doi.org/10.1103/PhysRevLett.119.232001

TY - JOUR

T1 - First Observation of the Rare Purely Baryonic Decay B0→pp.

AU - Adinolfi, M.

AU - Alexander, M.

AU - Ali, S.

AU - Alves, A. A.

AU - Andrews, J. E.

AU - Barlow, R. J.

AU - Benson, S.

AU - Blake, T.

AU - Bowen, E.

AU - Buchanan, E.

AU - Burr, C.

AU - Chen, S.

AU - Cheung, S. F.

AU - Clarke, P. E.L.

AU - Cogan, J.

AU - Cogoni, V.

AU - Collins, P.

AU - Coombs, G.

AU - Dalseno, J.

AU - Davis, A.

AU - De Paula, L.

AU - Douglas, L.

AU - Evans, H. M.

AU - Evans, T.

AU - Ferguson, D.

AU - Frank, M.

AU - Fu, J.

AU - Gibson, V.

AU - Han, X.

AU - Harnew, S. T.

AU - Harrison, J.

AU - Hatch, M.

AU - He, J.

AU - Henry, L.

AU - Hill, D.

AU - Johnson, D.

AU - Kariuki, J. M.

AU - Marconi, U.

AU - Naik, P.

AU - Petridis, K.

AU - Pomery, G. J.

AU - Prouve, C.

AU - Quagliani, R.

AU - Rademacker, J. H.

AU - Rives Molina, V.

AU - Saunders, D. M.

AU - Skidmore, N.

AU - Velthuis, J. J.

AU - Wallace, C.

AU - Wilson, F. F.

AU - LHCb Collaboration

PY - 2017/12/4

Y1 - 2017/12/4

N2 - The first observation of the decay of a B0 meson to a purely baryonic final state, B0→pp, is reported. The proton-proton collision data sample used was collected with the LHCb experiment at center-of-mass energies of 7 and 8 TeV and corresponds to an integrated luminosity of 3.0 fb-1. The branching fraction is determined to be B(B0→pp)=(1.25±0.27±0.18)×10-8, where the first uncertainty is statistical and the second systematic. The decay mode B0→pp is the rarest decay of the B0 meson observed to date. The decay Bs0→pp is also investigated. No signal is seen and the upper limit B(Bs0→pp)<1.5×10-8 at 90% confidence level is set on the branching fraction.

AB - The first observation of the decay of a B0 meson to a purely baryonic final state, B0→pp, is reported. The proton-proton collision data sample used was collected with the LHCb experiment at center-of-mass energies of 7 and 8 TeV and corresponds to an integrated luminosity of 3.0 fb-1. The branching fraction is determined to be B(B0→pp)=(1.25±0.27±0.18)×10-8, where the first uncertainty is statistical and the second systematic. The decay mode B0→pp is the rarest decay of the B0 meson observed to date. The decay Bs0→pp is also investigated. No signal is seen and the upper limit B(Bs0→pp)<1.5×10-8 at 90% confidence level is set on the branching fraction.

UR - http://www.scopus.com/inward/record.url?scp=85038397031&partnerID=8YFLogxK

U2 - 10.1103/PhysRevLett.119.232001

DO - 10.1103/PhysRevLett.119.232001

M3 - Article (Academic Journal)

C2 - 29286678

AN - SCOPUS:85038397031

SN - 0031-9007

VL - 119

JO - Physical Review Letters

JF - Physical Review Letters

IS - 23

M1 - 232001

ER -

First Observation of the Rare Purely Baryonic Decay B⁰→pp^.

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First Observation of the Rare Purely Baryonic Decay B0→pp.

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First Observation of the Rare Purely Baryonic Decay B⁰→pp^.