Exclusive electroproduction of J/ψ mesons at-HERA

S. Chekanov; M. Derrick; J. H. Loizides; S. Magill; S. Miglioranzi; B. Musgrave; J. Repond; R. Yoshida; M. C.K. Mattingly; N. Pavel; P. Antonioli; G. Bari; M. Basile; L. Bellagamba; D. Boscherini; A. Bruni; G. Bruni; G. Cara Romeo; L. Cifarelli; F. Cindolo; A. Contin; M. Corradi; S. De Pasquale; P. Giusti; G. Iacobucci; A. Margotti; A. Montanari; R. Nania; F. Palmonari; A. Pesci; L. Rinaldi; G. Sartorelli; A. Zichichi; G. Aghuzumtsyan; D. Bartsch; I. Brock; S. Goers; H. Hartmann; E. Hilger; P. Irrgang; H. P. Jakob; O. Kind; U. Meyer; E. Paul; J. Rautenberg; R. Renner; A. Stifutkin; J. Tandler; K. C. Voss; M. Wang; D. S. Bailey; N. H. Brook; J. E. Cole; G. P. Heath; T. Namsoo; S. Robins; M. Wing; M. Capua; A. Mastroberardino; M. Schioppa; G. Susinno; J. Y. Kim; I. T. Lim; K. J. Ma; M. Y. Pac; M. Helbich; Y. Ning; Z. Ren; W. B. Schmidke; F. Sciulli; J. Chwastowski; A. Eskreys; J. Figiel; A. Galas; K. Olkiewicz; P. Stopa; L. Zawiejski; L. Adamczyk; T. Bołd; I. Grabowska-Bołd; D. Kisielewska; A. M. Kowal; M. Kowal; J. Łukasik; M. Przybycieńn; L. Suszycki; D. Szuba; J. Szuba; A. Kotański; W. Słomiński; V. Adler; U. Behrens; I. Bloch; K. Borras; V. Chiochia; D. Dannheim; G. Drews; J. Fourletova; U. Fricke

doi:10.1016/j.nuclphysb.2004.06.034

Exclusive electroproduction of J/ψ mesons at-HERA

S. Chekanov, M. Derrick, J. H. Loizides, S. Magill, S. Miglioranzi, B. Musgrave, J. Repond, R. Yoshida, M. C.K. Mattingly, N. Pavel, P. Antonioli, G. Bari, M. Basile, L. Bellagamba, D. Boscherini, A. Bruni, G. Bruni, G. Cara Romeo, L. Cifarelli, F. CindoloA. Contin, M. Corradi, S. De Pasquale, P. Giusti, G. Iacobucci, A. Margotti, A. Montanari, R. Nania, F. Palmonari, A. Pesci, L. Rinaldi, G. Sartorelli, A. Zichichi, G. Aghuzumtsyan, D. Bartsch, I. Brock, S. Goers, H. Hartmann, E. Hilger, P. Irrgang, H. P. Jakob, O. Kind, U. Meyer, E. Paul, J. Rautenberg, R. Renner, A. Stifutkin, J. Tandler, K. C. Voss, M. Wang, D. S. Bailey, N. H. Brook, J. E. Cole, G. P. Heath, T. Namsoo, S. Robins, M. Wing, M. Capua, A. Mastroberardino, M. Schioppa, G. Susinno, J. Y. Kim, I. T. Lim, K. J. Ma, M. Y. Pac, M. Helbich, Y. Ning, Z. Ren, W. B. Schmidke, F. Sciulli, J. Chwastowski, A. Eskreys, J. Figiel, A. Galas, K. Olkiewicz, P. Stopa, L. Zawiejski, L. Adamczyk, T. Bołd, I. Grabowska-Bołd, D. Kisielewska, A. M. Kowal, M. Kowal, J. Łukasik, M. Przybycieńn, L. Suszycki, D. Szuba, J. Szuba, A. Kotański, W. Słomiński, V. Adler, U. Behrens, I. Bloch, K. Borras, V. Chiochia, D. Dannheim, G. Drews, J. Fourletova, U. Fricke

Risultato della ricerca: Contributo su rivista › Articolo in rivista › peer review

Abstract

The exclusive electroproduction of J/ψ mesons, ep→epJ/ψ, has been studied with the ZEUS detector at HERA for virtualities of the exchanged photon in the ranges 0.15<Q²<0.8 GeV² and 2<Q²<100 GeV² using integrated luminosities of 69 and 83 pb^-1, respectively. The photon-proton centre-of-mass energy was in the range 30<W<220 GeV and the squared four-momentum transfer at the proton vertex t <1 GeV². The cross sections and decay angular distributions are presented as functions of Q², W and t. The effective parameters of the pomeron trajectory are in agreement with those found in J/ψ photoproduction. The spin-density matrix elements, calculated from the decay angular distributions, are consistent with the hypothesis of s-channel helicity conservation. The ratio of the longitudinal to transverse cross sections, σ_L/σ_T, grows with Q², whilst no dependence on W or t is observed. The results are in agreement with perturbative QCD calculations and exhibit a strong sensitivity to the gluon distribution in the proton.

Lingua originale	Inglese
pagine (da-a)	3-37
Numero di pagine	35
Rivista	Nuclear Physics B
Volume	695
Numero di pubblicazione	1-2
DOI	https://doi.org/10.1016/j.nuclphysb.2004.06.034
Stato di pubblicazione	Pubblicato - 6 set 2004
Pubblicato esternamente	Sì

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10.1016/j.nuclphysb.2004.06.034

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Chekanov, S., Derrick, M., Loizides, J. H., Magill, S., Miglioranzi, S., Musgrave, B., Repond, J., Yoshida, R., Mattingly, M. C. K., Pavel, N., Antonioli, P., Bari, G., Basile, M., Bellagamba, L., Boscherini, D., Bruni, A., Bruni, G., Cara Romeo, G., Cifarelli, L., ... Fricke, U. (2004). Exclusive electroproduction of J/ψ mesons at-HERA. Nuclear Physics B, 695(1-2), 3-37. https://doi.org/10.1016/j.nuclphysb.2004.06.034

@article{a85f38115beb4226ad58117c6d1e5f9c,

title = "Exclusive electroproduction of J/ψ mesons at-HERA",

abstract = "The exclusive electroproduction of J/ψ mesons, ep→epJ/ψ, has been studied with the ZEUS detector at HERA for virtualities of the exchanged photon in the ranges 0.152<0.8 GeV2 and 22<100 GeV2 using integrated luminosities of 69 and 83 pb-1, respectively. The photon-proton centre-of-mass energy was in the range 302. The cross sections and decay angular distributions are presented as functions of Q2, W and t. The effective parameters of the pomeron trajectory are in agreement with those found in J/ψ photoproduction. The spin-density matrix elements, calculated from the decay angular distributions, are consistent with the hypothesis of s-channel helicity conservation. The ratio of the longitudinal to transverse cross sections, σL/σT, grows with Q2, whilst no dependence on W or t is observed. The results are in agreement with perturbative QCD calculations and exhibit a strong sensitivity to the gluon distribution in the proton.",

author = "S. Chekanov and M. Derrick and Loizides, {J. H.} and S. Magill and S. Miglioranzi and B. Musgrave and J. Repond and R. Yoshida and Mattingly, {M. C.K.} and N. Pavel and P. Antonioli and G. Bari and M. Basile and L. Bellagamba and D. Boscherini and A. Bruni and G. Bruni and {Cara Romeo}, G. and L. Cifarelli and F. Cindolo and A. Contin and M. Corradi and {De Pasquale}, S. and P. Giusti and G. Iacobucci and A. Margotti and A. Montanari and R. Nania and F. Palmonari and A. Pesci and L. Rinaldi and G. Sartorelli and A. Zichichi and G. Aghuzumtsyan and D. Bartsch and I. Brock and S. Goers and H. Hartmann and E. Hilger and P. Irrgang and Jakob, {H. P.} and O. Kind and U. Meyer and E. Paul and J. Rautenberg and R. Renner and A. Stifutkin and J. Tandler and Voss, {K. C.} and M. Wang and Bailey, {D. S.} and Brook, {N. H.} and Cole, {J. E.} and Heath, {G. P.} and T. Namsoo and S. Robins and M. Wing and M. Capua and A. Mastroberardino and M. Schioppa and G. Susinno and Kim, {J. Y.} and Lim, {I. T.} and Ma, {K. J.} and Pac, {M. Y.} and M. Helbich and Y. Ning and Z. Ren and Schmidke, {W. B.} and F. Sciulli and J. Chwastowski and A. Eskreys and J. Figiel and A. Galas and K. Olkiewicz and P. Stopa and L. Zawiejski and L. Adamczyk and T. Bo{\l}d and I. Grabowska-Bo{\l}d and D. Kisielewska and Kowal, {A. M.} and M. Kowal and J. {\L}ukasik and M. Przybycie{\'n}n and L. Suszycki and D. Szuba and J. Szuba and A. Kota{\'n}ski and W. S{\l}omi{\'n}ski and V. Adler and U. Behrens and I. Bloch and K. Borras and V. Chiochia and D. Dannheim and G. Drews and J. Fourletova and U. Fricke",

year = "2004",

month = sep,

day = "6",

doi = "10.1016/j.nuclphysb.2004.06.034",

language = "English",

volume = "695",

pages = "3--37",

journal = "Nuclear Physics B",

issn = "0550-3213",

publisher = "Elsevier",

number = "1-2",

}

Chekanov, S, Derrick, M, Loizides, JH, Magill, S, Miglioranzi, S, Musgrave, B, Repond, J, Yoshida, R, Mattingly, MCK, Pavel, N, Antonioli, P, Bari, G, Basile, M, Bellagamba, L, Boscherini, D, Bruni, A, Bruni, G, Cara Romeo, G, Cifarelli, L, Cindolo, F, Contin, A, Corradi, M, De Pasquale, S, Giusti, P, Iacobucci, G, Margotti, A, Montanari, A, Nania, R, Palmonari, F, Pesci, A, Rinaldi, L, Sartorelli, G, Zichichi, A, Aghuzumtsyan, G, Bartsch, D, Brock, I, Goers, S, Hartmann, H, Hilger, E, Irrgang, P, Jakob, HP, Kind, O, Meyer, U, Paul, E, Rautenberg, J, Renner, R, Stifutkin, A, Tandler, J, Voss, KC, Wang, M, Bailey, DS, Brook, NH, Cole, JE, Heath, GP, Namsoo, T, Robins, S, Wing, M, Capua, M, Mastroberardino, A, Schioppa, M, Susinno, G, Kim, JY, Lim, IT, Ma, KJ, Pac, MY, Helbich, M, Ning, Y, Ren, Z, Schmidke, WB, Sciulli, F, Chwastowski, J, Eskreys, A, Figiel, J, Galas, A, Olkiewicz, K, Stopa, P, Zawiejski, L, Adamczyk, L, Bołd, T, Grabowska-Bołd, I, Kisielewska, D, Kowal, AM, Kowal, M, Łukasik, J, Przybycieńn, M, Suszycki, L, Szuba, D, Szuba, J, Kotański, A, Słomiński, W, Adler, V, Behrens, U, Bloch, I, Borras, K, Chiochia, V, Dannheim, D, Drews, G, Fourletova, J & Fricke, U 2004, 'Exclusive electroproduction of J/ψ mesons at-HERA', Nuclear Physics B, vol. 695, n. 1-2, pagg. 3-37. https://doi.org/10.1016/j.nuclphysb.2004.06.034

TY - JOUR

T1 - Exclusive electroproduction of J/ψ mesons at-HERA

AU - Chekanov, S.

AU - Derrick, M.

AU - Loizides, J. H.

AU - Magill, S.

AU - Miglioranzi, S.

AU - Musgrave, B.

AU - Repond, J.

AU - Yoshida, R.

AU - Mattingly, M. C.K.

AU - Pavel, N.

AU - Antonioli, P.

AU - Bari, G.

AU - Basile, M.

AU - Bellagamba, L.

AU - Boscherini, D.

AU - Bruni, A.

AU - Bruni, G.

AU - Cara Romeo, G.

AU - Cifarelli, L.

AU - Cindolo, F.

AU - Contin, A.

AU - Corradi, M.

AU - De Pasquale, S.

AU - Giusti, P.

AU - Iacobucci, G.

AU - Margotti, A.

AU - Montanari, A.

AU - Nania, R.

AU - Palmonari, F.

AU - Pesci, A.

AU - Rinaldi, L.

AU - Sartorelli, G.

AU - Zichichi, A.

AU - Aghuzumtsyan, G.

AU - Bartsch, D.

AU - Brock, I.

AU - Goers, S.

AU - Hartmann, H.

AU - Hilger, E.

AU - Irrgang, P.

AU - Jakob, H. P.

AU - Kind, O.

AU - Meyer, U.

AU - Paul, E.

AU - Rautenberg, J.

AU - Renner, R.

AU - Stifutkin, A.

AU - Tandler, J.

AU - Voss, K. C.

AU - Wang, M.

AU - Bailey, D. S.

AU - Brook, N. H.

AU - Cole, J. E.

AU - Heath, G. P.

AU - Namsoo, T.

AU - Robins, S.

AU - Wing, M.

AU - Capua, M.

AU - Mastroberardino, A.

AU - Schioppa, M.

AU - Susinno, G.

AU - Kim, J. Y.

AU - Lim, I. T.

AU - Ma, K. J.

AU - Pac, M. Y.

AU - Helbich, M.

AU - Ning, Y.

AU - Ren, Z.

AU - Schmidke, W. B.

AU - Sciulli, F.

AU - Chwastowski, J.

AU - Eskreys, A.

AU - Figiel, J.

AU - Galas, A.

AU - Olkiewicz, K.

AU - Stopa, P.

AU - Zawiejski, L.

AU - Adamczyk, L.

AU - Bołd, T.

AU - Grabowska-Bołd, I.

AU - Kisielewska, D.

AU - Kowal, A. M.

AU - Kowal, M.

AU - Łukasik, J.

AU - Przybycieńn, M.

AU - Suszycki, L.

AU - Szuba, D.

AU - Szuba, J.

AU - Kotański, A.

AU - Słomiński, W.

AU - Adler, V.

AU - Behrens, U.

AU - Bloch, I.

AU - Borras, K.

AU - Chiochia, V.

AU - Dannheim, D.

AU - Drews, G.

AU - Fourletova, J.

AU - Fricke, U.

PY - 2004/9/6

Y1 - 2004/9/6

N2 - The exclusive electroproduction of J/ψ mesons, ep→epJ/ψ, has been studied with the ZEUS detector at HERA for virtualities of the exchanged photon in the ranges 0.152<0.8 GeV2 and 22<100 GeV2 using integrated luminosities of 69 and 83 pb-1, respectively. The photon-proton centre-of-mass energy was in the range 302. The cross sections and decay angular distributions are presented as functions of Q2, W and t. The effective parameters of the pomeron trajectory are in agreement with those found in J/ψ photoproduction. The spin-density matrix elements, calculated from the decay angular distributions, are consistent with the hypothesis of s-channel helicity conservation. The ratio of the longitudinal to transverse cross sections, σL/σT, grows with Q2, whilst no dependence on W or t is observed. The results are in agreement with perturbative QCD calculations and exhibit a strong sensitivity to the gluon distribution in the proton.

AB - The exclusive electroproduction of J/ψ mesons, ep→epJ/ψ, has been studied with the ZEUS detector at HERA for virtualities of the exchanged photon in the ranges 0.152<0.8 GeV2 and 22<100 GeV2 using integrated luminosities of 69 and 83 pb-1, respectively. The photon-proton centre-of-mass energy was in the range 302. The cross sections and decay angular distributions are presented as functions of Q2, W and t. The effective parameters of the pomeron trajectory are in agreement with those found in J/ψ photoproduction. The spin-density matrix elements, calculated from the decay angular distributions, are consistent with the hypothesis of s-channel helicity conservation. The ratio of the longitudinal to transverse cross sections, σL/σT, grows with Q2, whilst no dependence on W or t is observed. The results are in agreement with perturbative QCD calculations and exhibit a strong sensitivity to the gluon distribution in the proton.

UR - http://www.scopus.com/inward/record.url?scp=4344688226&partnerID=8YFLogxK

U2 - 10.1016/j.nuclphysb.2004.06.034

DO - 10.1016/j.nuclphysb.2004.06.034

M3 - Article

SN - 0550-3213

VL - 695

SP - 3

EP - 37

JO - Nuclear Physics B

JF - Nuclear Physics B

IS - 1-2

ER -

Exclusive electroproduction of J/ψ mesons at-HERA

Abstract

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