First observation of top quark production in the forward region

LHCb Collaboration; R. Aaij; B. Adeva; M. Adinolfi; A. Affolder; Z. Ajaltouni; S. Akar; J. Albrecht; F. Alessio; M. Alexander; S. Ali; G. Alkhazov; P. Alvarez Cartelle; A. A. Alves; S. Amato; S. Amerio; Y. Amhis; L. An; L. Anderlini; J. Anderson; M. Andreotti; J. E. Andrews; R. B. Appleby; O. Aquines Gutierrez; F. Archilli; P. D'Argent; A. Artamonov; M. Artuso; E. Aslanides; G. Auriemma; M. Baalouch; S. Bachmann; J. J. Back; A. Badalov; C. Baesso; W. Baldini; R. J. Barlow; C. Barschel; S. Barsuk; W. Barter; V. Batozskaya; S. Bifani; N. Farley; P. Griffith; I. R. Kenyon; C. Lazzeroni; A. Mazurov; J. McCarthy; L. Pescatore; N. K. Watson; T. Williams; Philip Ilten

doi:10.1103/PhysRevLett.115.112001

First observation of top quark production in the forward region

LHCb Collaboration, R. Aaij, B. Adeva, M. Adinolfi, A. Affolder, Z. Ajaltouni, S. Akar, J. Albrecht, F. Alessio, M. Alexander, S. Ali, G. Alkhazov, P. Alvarez Cartelle, A. A. Alves, S. Amato, S. Amerio, Y. Amhis, L. An, L. Anderlini, J. AndersonM. Andreotti, J. E. Andrews, R. B. Appleby, O. Aquines Gutierrez, F. Archilli, P. D'Argent, A. Artamonov, M. Artuso, E. Aslanides, G. Auriemma, M. Baalouch, S. Bachmann, J. J. Back, A. Badalov, C. Baesso, W. Baldini, R. J. Barlow, C. Barschel, S. Barsuk, W. Barter, V. Batozskaya, S. Bifani, N. Farley, P. Griffith, I. R. Kenyon, C. Lazzeroni, A. Mazurov, J. McCarthy, L. Pescatore, N. K. Watson, T. Williams, Philip Ilten

Physics and Astronomy

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Abstract

Top quark production in the forward region in proton-proton collisions is observed for the first time. The W+b final state with W→μν is reconstructed using muons with a transverse momentum, p_T, larger than 25 GeV in the pseudorapidity range 2.0<η<4.5. The b jets are required to have 50<p_T<100 GeV and 2.2<η<4.2, while the transverse component of the sum of the muon and b-jet momenta must satisfy p_T>20 GeV. The results are based on data corresponding to integrated luminosities of 1.0 and 2.0 fb^-1 collected at center-of-mass energies of 7 and 8 TeV by LHCb. The inclusive top quark production cross sections in the fiducial region are σ(top)[7 TeV]=239±53(stat)±33(syst)±24(theory) fb, σ(top)[8TeV]=289±43(stat)±40(syst)±29(theory) fb. These results, along with the observed differential yields and charge asymmetries, are in agreement with next-to-leading order standard model predictions.

Original language	English
Article number	112001
Number of pages	10
Journal	Physical Review Letters
Volume	115
Issue number	11
DOIs	https://doi.org/10.1103/PhysRevLett.115.112001
Publication status	Published - 8 Sept 2015

ASJC Scopus subject areas

Physics and Astronomy(all)

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LHCb Collaboration, Aaij, R., Adeva, B., Adinolfi, M., Affolder, A., Ajaltouni, Z., Akar, S., Albrecht, J., Alessio, F., Alexander, M., Ali, S., Alkhazov, G., Alvarez Cartelle, P., Alves, A. A., Amato, S., Amerio, S., Amhis, Y., An, L., Anderlini, L., ... Ilten, P. (2015). First observation of top quark production in the forward region. Physical Review Letters, 115(11), Article 112001. https://doi.org/10.1103/PhysRevLett.115.112001

@article{80f84438fb4d45eabc17793f39195ed8,

title = "First observation of top quark production in the forward region",

abstract = "Top quark production in the forward region in proton-proton collisions is observed for the first time. The W+b final state with W→μν is reconstructed using muons with a transverse momentum, pT, larger than 25 GeV in the pseudorapidity range 2.0<η<4.5. The b jets are required to have 50T<100 GeV and 2.2<η<4.2, while the transverse component of the sum of the muon and b-jet momenta must satisfy pT>20 GeV. The results are based on data corresponding to integrated luminosities of 1.0 and 2.0 fb-1 collected at center-of-mass energies of 7 and 8 TeV by LHCb. The inclusive top quark production cross sections in the fiducial region are σ(top)[7 TeV]=239±53(stat)±33(syst)±24(theory) fb, σ(top)[8TeV]=289±43(stat)±40(syst)±29(theory) fb. These results, along with the observed differential yields and charge asymmetries, are in agreement with next-to-leading order standard model predictions.",

author = "{LHCb Collaboration} and R. Aaij and B. Adeva and M. Adinolfi and A. Affolder 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 J. Anderson 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 W. Baldini and Barlow, {R. J.} and C. Barschel and S. Barsuk and W. Barter and V. Batozskaya and S. Bifani and N. Farley and P. Griffith and Kenyon, {I. R.} and C. Lazzeroni and A. Mazurov and J. McCarthy and L. Pescatore and Watson, {N. K.} and T. Williams and Philip Ilten",

year = "2015",

month = sep,

day = "8",

doi = "10.1103/PhysRevLett.115.112001",

language = "English",

volume = "115",

journal = "Physical Review Letters",

issn = "0031-9007",

publisher = "American Physical Society (APS)",

number = "11",

}

LHCb Collaboration, Aaij, R, Adeva, B, Adinolfi, M, Affolder, A, Ajaltouni, Z, Akar, S, Albrecht, J, Alessio, F, Alexander, M, Ali, S, Alkhazov, G, Alvarez Cartelle, P, Alves, AA, Amato, S, Amerio, S, Amhis, Y, An, L, Anderlini, L, Anderson, J, Andreotti, M, Andrews, JE, Appleby, RB, Aquines Gutierrez, O, Archilli, F, D'Argent, P, Artamonov, A, Artuso, M, Aslanides, E, Auriemma, G, Baalouch, M, Bachmann, S, Back, JJ, Badalov, A, Baesso, C, Baldini, W, Barlow, RJ, Barschel, C, Barsuk, S, Barter, W, Batozskaya, V, Bifani, S, Farley, N, Griffith, P, Kenyon, IR, Lazzeroni, C, Mazurov, A, McCarthy, J, Pescatore, L, Watson, NK, Williams, T & Ilten, P 2015, 'First observation of top quark production in the forward region', Physical Review Letters, vol. 115, no. 11, 112001. https://doi.org/10.1103/PhysRevLett.115.112001

TY - JOUR

T1 - First observation of top quark production in the forward region

AU - LHCb Collaboration

AU - Aaij, R.

AU - Adeva, B.

AU - Adinolfi, M.

AU - Affolder, A.

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 - Anderson, J.

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 - Baldini, W.

AU - Barlow, R. J.

AU - Barschel, C.

AU - Barsuk, S.

AU - Barter, W.

AU - Batozskaya, V.

AU - Bifani, S.

AU - Farley, N.

AU - Griffith, P.

AU - Kenyon, I. R.

AU - Lazzeroni, C.

AU - Mazurov, A.

AU - McCarthy, J.

AU - Pescatore, L.

AU - Watson, N. K.

AU - Williams, T.

AU - Ilten, Philip

PY - 2015/9/8

Y1 - 2015/9/8

N2 - Top quark production in the forward region in proton-proton collisions is observed for the first time. The W+b final state with W→μν is reconstructed using muons with a transverse momentum, pT, larger than 25 GeV in the pseudorapidity range 2.0<η<4.5. The b jets are required to have 50T<100 GeV and 2.2<η<4.2, while the transverse component of the sum of the muon and b-jet momenta must satisfy pT>20 GeV. The results are based on data corresponding to integrated luminosities of 1.0 and 2.0 fb-1 collected at center-of-mass energies of 7 and 8 TeV by LHCb. The inclusive top quark production cross sections in the fiducial region are σ(top)[7 TeV]=239±53(stat)±33(syst)±24(theory) fb, σ(top)[8TeV]=289±43(stat)±40(syst)±29(theory) fb. These results, along with the observed differential yields and charge asymmetries, are in agreement with next-to-leading order standard model predictions.

AB - Top quark production in the forward region in proton-proton collisions is observed for the first time. The W+b final state with W→μν is reconstructed using muons with a transverse momentum, pT, larger than 25 GeV in the pseudorapidity range 2.0<η<4.5. The b jets are required to have 50T<100 GeV and 2.2<η<4.2, while the transverse component of the sum of the muon and b-jet momenta must satisfy pT>20 GeV. The results are based on data corresponding to integrated luminosities of 1.0 and 2.0 fb-1 collected at center-of-mass energies of 7 and 8 TeV by LHCb. The inclusive top quark production cross sections in the fiducial region are σ(top)[7 TeV]=239±53(stat)±33(syst)±24(theory) fb, σ(top)[8TeV]=289±43(stat)±40(syst)±29(theory) fb. These results, along with the observed differential yields and charge asymmetries, are in agreement with next-to-leading order standard model predictions.

UR - http://www.scopus.com/inward/record.url?scp=84942162907&partnerID=8YFLogxK

U2 - 10.1103/PhysRevLett.115.112001

DO - 10.1103/PhysRevLett.115.112001

M3 - Article

AN - SCOPUS:84942162907

SN - 0031-9007

VL - 115

JO - Physical Review Letters

JF - Physical Review Letters

IS - 11

M1 - 112001

ER -

First observation of top quark production in the forward region

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