Measurement of the η<inf>c</inf>(1S) production cross-section in proton–proton collisions via the decay η<inf>c</inf>(1S) → pp: see text] production cross-section in proton-proton collisions via the decay [Formula: see text]

R. Aaij; C. Abellán Beteta; 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; R. Andreassen; M. Andreotti; J. E. Andrews; R. B. Appleby; O. Aquines Gutierrez; F. Archilli; 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; V. Battista; A. Bay; L. Beaucourt; J. Beddow; F. Bedeschi; I. Bediaga; S. Belogurov; K. Belous; I. Belyaev; E. Ben-Haim; G. Bencivenni; S. Benson; J. Benton; A. Berezhnoy; R. Bernet; M. O. Bettler; M. van Beuzekom; A. Bien; S. Bifani; T. Bird; A. Bizzeti; P. M. Bjørnstad; T. Blake; F. Blanc; J. Blouw; S. Blusk; V. Bocci; A. Bondar; N. Bondar; W. Bonivento; S. Borghi; A. Borgia; M. Borsato; T. J.V. Bowcock; E. Bowen; C. Bozzi; T. Brambach; J. Bressieux; D. Brett; M. Britsch; T. Britton; J. Brodzicka; N. H. Brook; H. Brown; A. Bursche; G. Busetto; J. Buytaert; S. Cadeddu; R. Calabrese; M. Calvi; M. Calvo Gomez; P. Campana; D. Campora Perez; A. Carbone; G. Carboni

doi:10.1140/epjc/s10052-015-3502-x

Measurement of the η<inf>c</inf>(1S) production cross-section in proton–proton collisions via the decay η<inf>c</inf>(1S) → pp: see text] production cross-section in proton-proton collisions via the decay [Formula: see text]

R. Aaij, C. Abellán Beteta, 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. AndersonR. Andreassen, M. Andreotti, J. E. Andrews, R. B. Appleby, O. Aquines Gutierrez, F. Archilli, 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, V. Battista, A. Bay, L. Beaucourt, J. Beddow, F. Bedeschi, I. Bediaga, S. Belogurov, K. Belous, I. Belyaev, E. Ben-Haim, G. Bencivenni, S. Benson, J. Benton, A. Berezhnoy, R. Bernet, M. O. Bettler, M. van Beuzekom, A. Bien, S. Bifani, T. Bird, A. Bizzeti, P. M. Bjørnstad, T. Blake, F. Blanc, J. Blouw, S. Blusk, V. Bocci, A. Bondar, N. Bondar, W. Bonivento, S. Borghi, A. Borgia, M. Borsato, T. J.V. Bowcock, E. Bowen, C. Bozzi, T. Brambach, J. Bressieux, D. Brett, M. Britsch, T. Britton, J. Brodzicka, N. H. Brook, H. Brown, A. Bursche, G. Busetto, J. Buytaert, S. Cadeddu, R. Calabrese, M. Calvi, M. Calvo Gomez, P. Campana, D. Campora Perez, A. Carbone, G. Carboni

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

86 Citations (Scopus)

Abstract

The production of the η _c(1S) state in proton-proton collisions is probed via its decay to the pp final state with the LHCb detector, in the rapidity range 2.0 < y < 4.5 and in the meson transverse-momentum range p _T > 6.5 GeV/c. The cross-section for prompt production of η _c;(1S) mesons relative to the prompt J/ψ cross-section is measured, for the first time, to be σ _ηc(1S)/σ _J/ψ = 1.74±0.29±0.28±0. 18 _B at a centre-of-mass energy (Formula presented.) using data corresponding to an integrated luminosity of 0.7 fb ^-1, and σ _ηc(1S)/σJ/ψ = 1.60±0.29±0.25±0.17 _B at (Formula presented.) using 2.0 fb ^-1. The uncertainties quoted are, in order, statistical, systematic, and that on the ratio of branching fractions of the η _c(1S) and J/ψ decays to the pp final state. In addition, the inclusive branching fraction of b-hadron decays into η _c(1S) mesons is measured, for the first time, to be B(b→η _cX)=(4.88±0.64±0.29±0.67 _B)× ^10-3, where the third uncertainty includes also the uncertainty on the J/ψ inclusive branching fraction from b-hadron decays. The difference between the J/ψ and η _c(1S) meson masses is determined to be 114.7±1.5±0.1MeV/c ².

Original language	English
Article number	311
Pages (from-to)	1-12
Journal	European Physical Journal C
Volume	75
Issue number	7
DOIs	https://doi.org/10.1140/epjc/s10052-015-3502-x
Publication status	Published - 28 Jul 2015
Externally published	Yes

Bibliographical note

Funding Information:
We would like to thank Emi Kou for motivating the studies of charmonium production in LHCb using hadronic final states and the useful discussions regarding charmonium production mechanisms. We express our gratitude to our colleagues in the CERN accelerator departments for the excellent performance of the LHC. We thank the technical and administrative staff at the LHCb institutes. We acknowledge support from CERN and from the national agencies: CAPES, CNPq, FAPERJ and FINEP (Brazil); NSFC (China); CNRS/IN2P3 (France); BMBF, DFG, HGF and MPG (Germany); SFI (Ireland); INFN (Italy); FOM and NWO (The Netherlands); MNiSW and NCN (Poland); MEN/IFA (Romania); MinES and FANO (Russia); MinECo (Spain); SNSF and SER (Switzerland); NASU (Ukraine); STFC (United Kingdom); NSF (USA). The Tier1 computing centres are supported by IN2P3 (France), KIT and BMBF (Germany), INFN (Italy), NWO and SURF (The Netherlands), PIC (Spain), GridPP (United Kingdom). We are indebted to the communities behind the multiple open source software packages on which we depend. We are also thankful for the computing resources and the access to software R&D tools provided by Yandex LLC (Russia). Individual groups or members have received support from EPLANET, Marie Skłodowska-Curie Actions and ERC (European Union), Conseil général de Haute-Savoie, Labex ENIGMASS and OCEVU, Région Auvergne (France), RFBR (Russia), XuntaGal and GENCAT (Spain), Royal Society and Royal Commission for the Exhibition of 1851 (United Kingdom).

Publisher Copyright:
© 2015, CERN for the benefit of the LHCb collaboration.

All Science Journal Classification (ASJC) codes

Engineering (miscellaneous)
Physics and Astronomy (miscellaneous)

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Aaij, R., Beteta, C. A., 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., ... Carboni, G. (2015). Measurement of the η<inf>c</inf>(1S) production cross-section in proton–proton collisions via the decay η<inf>c</inf>(1S) → pp: see text] production cross-section in proton-proton collisions via the decay [Formula: see text]. European Physical Journal C, 75(7), 1-12. Article 311. https://doi.org/10.1140/epjc/s10052-015-3502-x

@article{ab590b153d8840f2957718ae6afa89be,

title = "Measurement of the ηc(1S) production cross-section in proton–proton collisions via the decay ηc(1S) → pp: see text] production cross-section in proton-proton collisions via the decay [Formula: see text]",

abstract = "The production of the η c(1S) state in proton-proton collisions is probed via its decay to the pp final state with the LHCb detector, in the rapidity range 2.0 < y < 4.5 and in the meson transverse-momentum range p T > 6.5 GeV/c. The cross-section for prompt production of η c;(1S) mesons relative to the prompt J/ψ cross-section is measured, for the first time, to be σ ηc(1S)/σ J/ψ = 1.74±0.29±0.28±0. 18 B at a centre-of-mass energy (Formula presented.) using data corresponding to an integrated luminosity of 0.7 fb -1, and σ ηc(1S)/σJ/ψ = 1.60±0.29±0.25±0.17 B at (Formula presented.) using 2.0 fb -1. The uncertainties quoted are, in order, statistical, systematic, and that on the ratio of branching fractions of the η c(1S) and J/ψ decays to the pp final state. In addition, the inclusive branching fraction of b-hadron decays into η c(1S) mesons is measured, for the first time, to be B(b→η cX)=(4.88±0.64±0.29±0.67 B)× 10-3, where the third uncertainty includes also the uncertainty on the J/ψ inclusive branching fraction from b-hadron decays. The difference between the J/ψ and η c(1S) meson masses is determined to be 114.7±1.5±0.1MeV/c 2. ",

author = "R. Aaij and Beteta, {C. Abell{\'a}n} 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 R. Andreassen and M. Andreotti and Andrews, {J. E.} and Appleby, {R. B.} and {Aquines Gutierrez}, O. and F. Archilli 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 V. Battista and A. Bay and L. Beaucourt 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 R. Bernet and Bettler, {M. O.} and {van Beuzekom}, M. and A. Bien and S. Bifani and T. Bird and A. Bizzeti and Bj{\o}rnstad, {P. M.} and T. Blake and F. Blanc and J. Blouw and S. Blusk and V. Bocci and A. Bondar and N. Bondar and W. Bonivento and S. Borghi and A. Borgia and M. Borsato and Bowcock, {T. J.V.} and E. Bowen and C. Bozzi and T. Brambach and J. Bressieux and D. Brett and M. Britsch and T. Britton and J. Brodzicka and Brook, {N. H.} and H. Brown and A. Bursche and G. Busetto and J. Buytaert and S. Cadeddu and R. Calabrese and M. Calvi and {Calvo Gomez}, M. and P. Campana and {Campora Perez}, D. and A. Carbone and G. Carboni",

note = "Funding Information: We would like to thank Emi Kou for motivating the studies of charmonium production in LHCb using hadronic final states and the useful discussions regarding charmonium production mechanisms. We express our gratitude to our colleagues in the CERN accelerator departments for the excellent performance of the LHC. We thank the technical and administrative staff at the LHCb institutes. We acknowledge support from CERN and from the national agencies: CAPES, CNPq, FAPERJ and FINEP (Brazil); NSFC (China); CNRS/IN2P3 (France); BMBF, DFG, HGF and MPG (Germany); SFI (Ireland); INFN (Italy); FOM and NWO (The Netherlands); MNiSW and NCN (Poland); MEN/IFA (Romania); MinES and FANO (Russia); MinECo (Spain); SNSF and SER (Switzerland); NASU (Ukraine); STFC (United Kingdom); NSF (USA). The Tier1 computing centres are supported by IN2P3 (France), KIT and BMBF (Germany), INFN (Italy), NWO and SURF (The Netherlands), PIC (Spain), GridPP (United Kingdom). We are indebted to the communities behind the multiple open source software packages on which we depend. We are also thankful for the computing resources and the access to software R&D tools provided by Yandex LLC (Russia). Individual groups or members have received support from EPLANET, Marie Sk{\l}odowska-Curie Actions and ERC (European Union), Conseil g{\'e}n{\'e}ral de Haute-Savoie, Labex ENIGMASS and OCEVU, R{\'e}gion Auvergne (France), RFBR (Russia), XuntaGal and GENCAT (Spain), Royal Society and Royal Commission for the Exhibition of 1851 (United Kingdom). Publisher Copyright: {\textcopyright} 2015, CERN for the benefit of the LHCb collaboration.",

year = "2015",

month = jul,

day = "28",

doi = "10.1140/epjc/s10052-015-3502-x",

language = "English",

volume = "75",

pages = "1--12",

journal = "European Physical Journal C",

issn = "1434-6044",

publisher = "Springer New York",

number = "7",

}

Aaij, R, Beteta, CA, 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, Andreassen, R, Andreotti, M, Andrews, JE, Appleby, RB, Aquines Gutierrez, O, Archilli, F, 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, Battista, V, Bay, A, Beaucourt, L, Beddow, J, Bedeschi, F, Bediaga, I, Belogurov, S, Belous, K, Belyaev, I, Ben-Haim, E, Bencivenni, G, Benson, S, Benton, J, Berezhnoy, A, Bernet, R, Bettler, MO, van Beuzekom, M, Bien, A, Bifani, S, Bird, T, Bizzeti, A, Bjørnstad, PM, Blake, T, Blanc, F, Blouw, J, Blusk, S, Bocci, V, Bondar, A, Bondar, N, Bonivento, W, Borghi, S, Borgia, A, Borsato, M, Bowcock, TJV, Bowen, E, Bozzi, C, Brambach, T, Bressieux, J, Brett, D, Britsch, M, Britton, T, Brodzicka, J, Brook, NH, Brown, H, Bursche, A, Busetto, G, Buytaert, J, Cadeddu, S, Calabrese, R, Calvi, M, Calvo Gomez, M, Campana, P, Campora Perez, D, Carbone, A & Carboni, G 2015, 'Measurement of the η<inf>c</inf>(1S) production cross-section in proton–proton collisions via the decay η<inf>c</inf>(1S) → pp: see text] production cross-section in proton-proton collisions via the decay [Formula: see text]', European Physical Journal C, vol. 75, no. 7, 311, pp. 1-12. https://doi.org/10.1140/epjc/s10052-015-3502-x

Measurement of the η<inf>c</inf>(1S) production cross-section in proton–proton collisions via the decay η<inf>c</inf>(1S) → pp: see text] production cross-section in proton-proton collisions via the decay [Formula: see text]. / Aaij, R.; Beteta, C. Abellán; Adeva, B. et al.
In: European Physical Journal C, Vol. 75, No. 7, 311, 28.07.2015, p. 1-12.

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

TY - JOUR

T1 - Measurement of the ηc(1S) production cross-section in proton–proton collisions via the decay ηc(1S) → pp

T2 - see text] production cross-section in proton-proton collisions via the decay [Formula: see text]

AU - Aaij, R.

AU - Beteta, C. Abellán

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 - Andreassen, R.

AU - Andreotti, M.

AU - Andrews, J. E.

AU - Appleby, R. B.

AU - Aquines Gutierrez, O.

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 - 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 - Battista, V.

AU - Bay, A.

AU - Beaucourt, L.

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 - Bernet, R.

AU - Bettler, M. O.

AU - van Beuzekom, M.

AU - Bien, A.

AU - Bifani, S.

AU - Bird, T.

AU - Bizzeti, A.

AU - Bjørnstad, P. M.

AU - Blake, T.

AU - Blanc, F.

AU - Blouw, J.

AU - Blusk, S.

AU - Bocci, V.

AU - Bondar, A.

AU - Bondar, N.

AU - Bonivento, W.

AU - Borghi, S.

AU - Borgia, A.

AU - Borsato, M.

AU - Bowcock, T. J.V.

AU - Bowen, E.

AU - Bozzi, C.

AU - Brambach, T.

AU - Bressieux, J.

AU - Brett, D.

AU - Britsch, M.

AU - Britton, T.

AU - Brodzicka, J.

AU - Brook, N. H.

AU - Brown, H.

AU - Bursche, A.

AU - Busetto, G.

AU - Buytaert, J.

AU - Cadeddu, S.

AU - Calabrese, R.

AU - Calvi, M.

AU - Calvo Gomez, M.

AU - Campana, P.

AU - Campora Perez, D.

AU - Carbone, A.

AU - Carboni, G.

N1 - Funding Information: We would like to thank Emi Kou for motivating the studies of charmonium production in LHCb using hadronic final states and the useful discussions regarding charmonium production mechanisms. We express our gratitude to our colleagues in the CERN accelerator departments for the excellent performance of the LHC. We thank the technical and administrative staff at the LHCb institutes. We acknowledge support from CERN and from the national agencies: CAPES, CNPq, FAPERJ and FINEP (Brazil); NSFC (China); CNRS/IN2P3 (France); BMBF, DFG, HGF and MPG (Germany); SFI (Ireland); INFN (Italy); FOM and NWO (The Netherlands); MNiSW and NCN (Poland); MEN/IFA (Romania); MinES and FANO (Russia); MinECo (Spain); SNSF and SER (Switzerland); NASU (Ukraine); STFC (United Kingdom); NSF (USA). The Tier1 computing centres are supported by IN2P3 (France), KIT and BMBF (Germany), INFN (Italy), NWO and SURF (The Netherlands), PIC (Spain), GridPP (United Kingdom). We are indebted to the communities behind the multiple open source software packages on which we depend. We are also thankful for the computing resources and the access to software R&D tools provided by Yandex LLC (Russia). Individual groups or members have received support from EPLANET, Marie Skłodowska-Curie Actions and ERC (European Union), Conseil général de Haute-Savoie, Labex ENIGMASS and OCEVU, Région Auvergne (France), RFBR (Russia), XuntaGal and GENCAT (Spain), Royal Society and Royal Commission for the Exhibition of 1851 (United Kingdom). Publisher Copyright: © 2015, CERN for the benefit of the LHCb collaboration.

PY - 2015/7/28

Y1 - 2015/7/28

N2 - The production of the η c(1S) state in proton-proton collisions is probed via its decay to the pp final state with the LHCb detector, in the rapidity range 2.0 < y < 4.5 and in the meson transverse-momentum range p T > 6.5 GeV/c. The cross-section for prompt production of η c;(1S) mesons relative to the prompt J/ψ cross-section is measured, for the first time, to be σ ηc(1S)/σ J/ψ = 1.74±0.29±0.28±0. 18 B at a centre-of-mass energy (Formula presented.) using data corresponding to an integrated luminosity of 0.7 fb -1, and σ ηc(1S)/σJ/ψ = 1.60±0.29±0.25±0.17 B at (Formula presented.) using 2.0 fb -1. The uncertainties quoted are, in order, statistical, systematic, and that on the ratio of branching fractions of the η c(1S) and J/ψ decays to the pp final state. In addition, the inclusive branching fraction of b-hadron decays into η c(1S) mesons is measured, for the first time, to be B(b→η cX)=(4.88±0.64±0.29±0.67 B)× 10-3, where the third uncertainty includes also the uncertainty on the J/ψ inclusive branching fraction from b-hadron decays. The difference between the J/ψ and η c(1S) meson masses is determined to be 114.7±1.5±0.1MeV/c 2.

AB - The production of the η c(1S) state in proton-proton collisions is probed via its decay to the pp final state with the LHCb detector, in the rapidity range 2.0 < y < 4.5 and in the meson transverse-momentum range p T > 6.5 GeV/c. The cross-section for prompt production of η c;(1S) mesons relative to the prompt J/ψ cross-section is measured, for the first time, to be σ ηc(1S)/σ J/ψ = 1.74±0.29±0.28±0. 18 B at a centre-of-mass energy (Formula presented.) using data corresponding to an integrated luminosity of 0.7 fb -1, and σ ηc(1S)/σJ/ψ = 1.60±0.29±0.25±0.17 B at (Formula presented.) using 2.0 fb -1. The uncertainties quoted are, in order, statistical, systematic, and that on the ratio of branching fractions of the η c(1S) and J/ψ decays to the pp final state. In addition, the inclusive branching fraction of b-hadron decays into η c(1S) mesons is measured, for the first time, to be B(b→η cX)=(4.88±0.64±0.29±0.67 B)× 10-3, where the third uncertainty includes also the uncertainty on the J/ψ inclusive branching fraction from b-hadron decays. The difference between the J/ψ and η c(1S) meson masses is determined to be 114.7±1.5±0.1MeV/c 2.

UR - http://www.scopus.com/inward/record.url?scp=84940556641&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84940556641&partnerID=8YFLogxK

UR - https://www.mendeley.com/catalogue/8d1ccbaf-b9d3-3d13-aefa-d07b277d1f67/

U2 - 10.1140/epjc/s10052-015-3502-x

DO - 10.1140/epjc/s10052-015-3502-x

M3 - Article

C2 - 26190939

SN - 1434-6044

VL - 75

SP - 1

EP - 12

JO - European Physical Journal C

JF - European Physical Journal C

IS - 7

M1 - 311

ER -

Aaij R, Beteta CA, Adeva B, Adinolfi M, Affolder A, Ajaltouni Z et al. Measurement of the η<inf>c</inf>(1S) production cross-section in proton–proton collisions via the decay η<inf>c</inf>(1S) → pp: see text] production cross-section in proton-proton collisions via the decay [Formula: see text]. European Physical Journal C. 2015 Jul 28;75(7):1-12. 311. doi: 10.1140/epjc/s10052-015-3502-x

Measurement of the η<inf>c</inf>(1S) production cross-section in proton–proton collisions via the decay η<inf>c</inf>(1S) → pp: see text] production cross-section in proton-proton collisions via the decay [Formula: see text]

Abstract

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