First evidence for the two-body charmless baryonic decay B-0 -> p(p)over-bar

R. Aaij; B. Adeva; M. Adinolfi; C. Adrover; A. Affolder; Z. Ajaltouni; J. Albrecht; F. Alessio; M. Alexander; S. Ali; G. Alkhazov; P.A. Cartelle; A.A. Alves; S. Amato; S. Amerio; Y. Amhis; L. Anderlini; J. Anderson; R. Andreassen; J.E. Andrews; R.B. Appleby; O.A. Gutierrez; F. Archilli; A. Artamonov; M. Artuso; E. Aslanides; G. Auriemma; M. Baalouch; S. Bachmann; J.J. Back; C. Baesso; V. Balagura; W. Baldini; R.J. Barlow; C. Barschel; S. Barsuk; W. Barter; T. Bauer; A. Bay; J. Beddow; F. Bedeschi; I. Bediaga; S. Belogurov; K. Belous; I. Belyaev; E. Ben-Haim; G. Bencivenni; S. Benson; J. Benton; A. Berezhnoy; J. van den Brand

doi:10.1007/JHEP10(2013)005

First evidence for the two-body charmless baryonic decay B-0 -> p(p)over-bar

R. Aaij^*, B. Adeva, M. Adinolfi, C. Adrover, A. Affolder, Z. Ajaltouni, J. Albrecht, F. Alessio, M. Alexander, S. Ali, G. Alkhazov, P.A. Cartelle, A.A. Alves, S. Amato, S. Amerio, Y. Amhis, L. Anderlini, J. Anderson, R. Andreassen, J.E. AndrewsR.B. Appleby, O.A. Gutierrez, F. Archilli, A. Artamonov, M. Artuso, E. Aslanides, G. Auriemma, M. Baalouch, S. Bachmann, J.J. Back, C. Baesso, V. Balagura, W. Baldini, R.J. Barlow, C. Barschel, S. Barsuk, W. Barter, T. Bauer, A. Bay, J. Beddow, F. Bedeschi, I. Bediaga, S. Belogurov, K. Belous, I. Belyaev, E. Ben-Haim, G. Bencivenni, S. Benson, J. Benton, A. Berezhnoy, J. van den Brand

^*Corresponding author for this work

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

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Abstract

The results of a search for the rare two-body charmless baryonic decays B-0 -> p (p) over bar and B-s(0) -> p (p) over bar are reported. The analysis uses a data sample, corresponding to an integrated luminosity of 0.9 fb(-1), of p p collision data collected by the LHCb experiment at a centre-of-mass energy of 7 TeV. An excess of B-0 -> p (p) over bar candidates with respect to background expectations is seen with a statistical significance of 3.3 standard deviations. This is the first evidence for a two-body charmless baryonic B-0 decay. No significant B-s(0) -> p (p) over bar signal is observed, leading to an improvement of three orders of magnitude over previous bounds. If the excess events are interpreted as signal, the 68.3% confidence level intervals on the branching fractions areB(B-0 -> p (p) over bar) = (1.47(-0.51)(+0.62) (-0.14) (+0.35)) x 10(-8),B(B-s(0) -> p (p) over bar) = (2.84(-1.68)(+2.03) (+0.85)(-0.18)) x 10(-8),where the first uncertainty is statistical and the second is systematic.

Original language	English
Article number	005
Number of pages	17
Journal	Journal of High Energy Physics
Issue number	10
DOIs	https://doi.org/10.1007/JHEP10(2013)005
Publication status	Published - 1 Oct 2013
Externally published	Yes

Keywords

QCD
Branching fraction
B physics
Flavor physics
Hadron-Hadron Scattering
EXCLUSIVE DECAYS
MESONS
SEARCH

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10.1007/JHEP10(2013)005Licence: CC BY

Cite this

Aaij, R., Adeva, B., Adinolfi, M., Adrover, C., Affolder, A., Ajaltouni, Z., Albrecht, J., Alessio, F., Alexander, M., Ali, S., Alkhazov, G., Cartelle, P. A., Alves, A. A., Amato, S., Amerio, S., Amhis, Y., Anderlini, L., Anderson, J., Andreassen, R., ... van den Brand, J. (2013). First evidence for the two-body charmless baryonic decay B-0 -> p(p)over-bar. Journal of High Energy Physics, (10), Article 005. https://doi.org/10.1007/JHEP10(2013)005

@article{68b750e72bac46c4b9191fb44b406fc7,

title = "First evidence for the two-body charmless baryonic decay B-0 -> p(p)over-bar",

abstract = "The results of a search for the rare two-body charmless baryonic decays B-0 -> p (p) over bar and B-s(0) -> p (p) over bar are reported. The analysis uses a data sample, corresponding to an integrated luminosity of 0.9 fb(-1), of p p collision data collected by the LHCb experiment at a centre-of-mass energy of 7 TeV. An excess of B-0 -> p (p) over bar candidates with respect to background expectations is seen with a statistical significance of 3.3 standard deviations. This is the first evidence for a two-body charmless baryonic B-0 decay. No significant B-s(0) -> p (p) over bar signal is observed, leading to an improvement of three orders of magnitude over previous bounds. If the excess events are interpreted as signal, the 68.3% confidence level intervals on the branching fractions areB(B-0 -> p (p) over bar) = (1.47(-0.51)(+0.62) (-0.14) (+0.35)) x 10(-8),B(B-s(0) -> p (p) over bar) = (2.84(-1.68)(+2.03) (+0.85)(-0.18)) x 10(-8),where the first uncertainty is statistical and the second is systematic.",

keywords = "QCD, Branching fraction, B physics, Flavor physics, Hadron-Hadron Scattering, EXCLUSIVE DECAYS, MESONS, SEARCH",

author = "R. Aaij 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 P.A. Cartelle and A.A. Alves and S. Amato and S. Amerio and Y. Amhis and L. Anderlini and J. Anderson and R. Andreassen and J.E. Andrews and R.B. Appleby and O.A. Gutierrez and F. Archilli and A. Artamonov and M. Artuso and E. Aslanides and G. Auriemma and M. Baalouch and S. Bachmann and J.J. Back and C. Baesso and V. Balagura and W. Baldini and R.J. Barlow and C. Barschel and S. Barsuk and W. Barter and T. Bauer and A. Bay and J. Beddow and F. Bedeschi and I. Bediaga and S. Belogurov and K. Belous and I. Belyaev and E. Ben-Haim and G. Bencivenni and S. Benson and J. Benton and A. Berezhnoy and {van den Brand}, J.",

year = "2013",

month = oct,

day = "1",

doi = "10.1007/JHEP10(2013)005",

language = "English",

journal = "Journal of High Energy Physics",

issn = "1029-8479",

publisher = "Springer Verlag",

number = "10",

}

Aaij, R, Adeva, B, Adinolfi, M, Adrover, C, Affolder, A, Ajaltouni, Z, Albrecht, J, Alessio, F, Alexander, M, Ali, S, Alkhazov, G, Cartelle, PA, Alves, AA, Amato, S, Amerio, S, Amhis, Y, Anderlini, L, Anderson, J, Andreassen, R, Andrews, JE, Appleby, RB, Gutierrez, OA, Archilli, F, Artamonov, A, Artuso, M, Aslanides, E, Auriemma, G, Baalouch, M, Bachmann, S, Back, JJ, Baesso, C, Balagura, V, Baldini, W, Barlow, RJ, Barschel, C, Barsuk, S, Barter, W, Bauer, T, Bay, A, Beddow, J, Bedeschi, F, Bediaga, I, Belogurov, S, Belous, K, Belyaev, I, Ben-Haim, E, Bencivenni, G, Benson, S, Benton, J, Berezhnoy, A & van den Brand, J 2013, 'First evidence for the two-body charmless baryonic decay B-0 -> p(p)over-bar', Journal of High Energy Physics, no. 10, 005. https://doi.org/10.1007/JHEP10(2013)005

TY - JOUR

T1 - First evidence for the two-body charmless baryonic decay B-0 -> p(p)over-bar

AU - Aaij, R.

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 - Cartelle, P.A.

AU - Alves, A.A.

AU - Amato, S.

AU - Amerio, S.

AU - Amhis, Y.

AU - Anderlini, L.

AU - Anderson, J.

AU - Andreassen, R.

AU - Andrews, J.E.

AU - Appleby, R.B.

AU - Gutierrez, O.A.

AU - Archilli, F.

AU - Artamonov, A.

AU - Artuso, M.

AU - Aslanides, E.

AU - Auriemma, G.

AU - Baalouch, M.

AU - Bachmann, S.

AU - Back, J.J.

AU - Baesso, C.

AU - Balagura, V.

AU - Baldini, W.

AU - Barlow, R.J.

AU - Barschel, C.

AU - Barsuk, S.

AU - Barter, W.

AU - Bauer, T.

AU - Bay, A.

AU - Beddow, J.

AU - Bedeschi, F.

AU - Bediaga, I.

AU - Belogurov, S.

AU - Belous, K.

AU - Belyaev, I.

AU - Ben-Haim, E.

AU - Bencivenni, G.

AU - Benson, S.

AU - Benton, J.

AU - Berezhnoy, A.

AU - van den Brand, J.

PY - 2013/10/1

Y1 - 2013/10/1

N2 - The results of a search for the rare two-body charmless baryonic decays B-0 -> p (p) over bar and B-s(0) -> p (p) over bar are reported. The analysis uses a data sample, corresponding to an integrated luminosity of 0.9 fb(-1), of p p collision data collected by the LHCb experiment at a centre-of-mass energy of 7 TeV. An excess of B-0 -> p (p) over bar candidates with respect to background expectations is seen with a statistical significance of 3.3 standard deviations. This is the first evidence for a two-body charmless baryonic B-0 decay. No significant B-s(0) -> p (p) over bar signal is observed, leading to an improvement of three orders of magnitude over previous bounds. If the excess events are interpreted as signal, the 68.3% confidence level intervals on the branching fractions areB(B-0 -> p (p) over bar) = (1.47(-0.51)(+0.62) (-0.14) (+0.35)) x 10(-8),B(B-s(0) -> p (p) over bar) = (2.84(-1.68)(+2.03) (+0.85)(-0.18)) x 10(-8),where the first uncertainty is statistical and the second is systematic.

AB - The results of a search for the rare two-body charmless baryonic decays B-0 -> p (p) over bar and B-s(0) -> p (p) over bar are reported. The analysis uses a data sample, corresponding to an integrated luminosity of 0.9 fb(-1), of p p collision data collected by the LHCb experiment at a centre-of-mass energy of 7 TeV. An excess of B-0 -> p (p) over bar candidates with respect to background expectations is seen with a statistical significance of 3.3 standard deviations. This is the first evidence for a two-body charmless baryonic B-0 decay. No significant B-s(0) -> p (p) over bar signal is observed, leading to an improvement of three orders of magnitude over previous bounds. If the excess events are interpreted as signal, the 68.3% confidence level intervals on the branching fractions areB(B-0 -> p (p) over bar) = (1.47(-0.51)(+0.62) (-0.14) (+0.35)) x 10(-8),B(B-s(0) -> p (p) over bar) = (2.84(-1.68)(+2.03) (+0.85)(-0.18)) x 10(-8),where the first uncertainty is statistical and the second is systematic.

KW - QCD

KW - Branching fraction

KW - B physics

KW - Flavor physics

KW - Hadron-Hadron Scattering

KW - EXCLUSIVE DECAYS

KW - MESONS

KW - SEARCH

U2 - 10.1007/JHEP10(2013)005

DO - 10.1007/JHEP10(2013)005

M3 - Article

SN - 1029-8479

JO - Journal of High Energy Physics

JF - Journal of High Energy Physics

IS - 10

M1 - 005

ER -