The Q2 dependence of dijet cross sections in γp interactions at HERA

J. Breitweg; S. Chekanov; M. Derrick; D. Krakauer; S. Magill; B. Musgrave; A. Pellegrino; J. Repond; R. Stanek; R. Yoshida; M. C.K. Mattingly; G. Abbiendi; F. Anselmo; P. Antonioli; G. Bari; M. Basile; L. Bellagamba; D. Boscherini; A. Bruni; G. Bruni; G. Cara Romeo; G. Castellini; L. Cifarelli; F. Cindolo; A. Contin; N. Coppola; M. Corradi; S. De Pasquale; P. Giusti; G. Iacobucci; G. Laurenti; G. Levi; A. Margotti; T. Massam; R. Nania; F. Palmonari; A. Pesci; A. Polini; G. Sartorelli; Y. Zamora Garcia; A. Zichichi; C. Amelung; A. Bornheim; I. Brock; K. Coböken; J. Crittenden; R. Deffner; H. Hartmann; K. Heinloth; E. Hilger; P. Irrgang; H. P. Jakob; A. Kappes; U. F. Katz; R. Kerger; E. Paul; H. Schnurbusch; A. Stifutkin; J. Tandler; K. Ch Voss; A. Weber; H. Wieber; D. S. Bailey; O. Barret; N. H. Brook; B. Foster; G. P. Heath; H. F. Heath; J. D. McFall; D. Piccioni; E. Rodrigues; J. Scott; R. J. Tapper; M. Capua; A. Mastroberardino; M. Schioppa; G. Susinno

doi:10.1016/S0370-2693(00)00311-7

The Q² dependence of dijet cross sections in γp interactions at HERA

J. Breitweg, S. Chekanov, M. Derrick, D. Krakauer, S. Magill, B. Musgrave, A. Pellegrino, J. Repond, R. Stanek, R. Yoshida, M. C.K. Mattingly, G. Abbiendi, F. Anselmo, P. Antonioli, G. Bari, M. Basile, L. Bellagamba, D. Boscherini, A. Bruni, G. BruniG. Cara Romeo, G. Castellini, L. Cifarelli, F. Cindolo, A. Contin, N. Coppola, M. Corradi, S. De Pasquale, P. Giusti, G. Iacobucci, G. Laurenti, G. Levi, A. Margotti, T. Massam, R. Nania, F. Palmonari, A. Pesci, A. Polini, G. Sartorelli, Y. Zamora Garcia, A. Zichichi, C. Amelung, A. Bornheim, I. Brock, K. Coböken, J. Crittenden, R. Deffner, H. Hartmann, K. Heinloth, E. Hilger, P. Irrgang, H. P. Jakob, A. Kappes, U. F. Katz, R. Kerger, E. Paul, H. Schnurbusch, A. Stifutkin, J. Tandler, K. Ch Voss, A. Weber, H. Wieber, D. S. Bailey, O. Barret, N. H. Brook, B. Foster, G. P. Heath, H. F. Heath, J. D. McFall, D. Piccioni, E. Rodrigues, J. Scott, R. J. Tapper, M. Capua, A. Mastroberardino, M. Schioppa, G. Susinno

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

Abstract

The dependence of the photon structure on the photon virtuality, Q², is studied by measuring the reaction e⁺p → e⁺ + jet + jet + X at photon-proton centre-of-mass energies 134 < W < 223 GeV. Events have been selected in the Q² ranges ≃ 0 GeV², 0.1-0.55 GeV², and 1.5-4.5 GeV², having two jets with transverse energy E(T)/(jet) > 5.5 GeV in the final state. The dijet cross section has been measured as a function of the fractional momentum of the photon participating in the hard process, x(γ)/(OBS). The ratio of the dijet cross section with x(γ)/(OBS) < 0.75 to that with x(γ)/(OBS) > 0.75 decreases as Q² increases. The data are compared with the predictions of NLO pQCD and leading-order Monte Carlo programs using various parton distribution functions of the photon. The measurements can be interpreted in terms of a resolved photon component that falls with Q² but remains present at values of Q² up to 4.5 GeV². However, none of the models considered gives a good description of the data. (C)

Lingua originale	Inglese
pagine (da-a)	37-52
Numero di pagine	16
Rivista	Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Volume	479
Numero di pubblicazione	1-3
DOI	https://doi.org/10.1016/S0370-2693(00)00311-7
Stato di pubblicazione	Pubblicato - 20 apr 2000
Pubblicato esternamente	Sì

Accesso al documento

10.1016/S0370-2693(00)00311-7

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Breitweg, J., Chekanov, S., Derrick, M., Krakauer, D., Magill, S., Musgrave, B., Pellegrino, A., Repond, J., Stanek, R., Yoshida, R., Mattingly, M. C. K., Abbiendi, G., Anselmo, F., Antonioli, P., Bari, G., Basile, M., Bellagamba, L., Boscherini, D., Bruni, A., ... Susinno, G. (2000). The Q² dependence of dijet cross sections in γp interactions at HERA. Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, 479(1-3), 37-52. https://doi.org/10.1016/S0370-2693(00)00311-7

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title = "The Q2 dependence of dijet cross sections in γp interactions at HERA",

abstract = "The dependence of the photon structure on the photon virtuality, Q2, is studied by measuring the reaction e+p → e+ + jet + jet + X at photon-proton centre-of-mass energies 134 < W < 223 GeV. Events have been selected in the Q2 ranges ≃ 0 GeV2, 0.1-0.55 GeV2, and 1.5-4.5 GeV2, having two jets with transverse energy E(T)/(jet) > 5.5 GeV in the final state. The dijet cross section has been measured as a function of the fractional momentum of the photon participating in the hard process, x(γ)/(OBS). The ratio of the dijet cross section with x(γ)/(OBS) < 0.75 to that with x(γ)/(OBS) > 0.75 decreases as Q2 increases. The data are compared with the predictions of NLO pQCD and leading-order Monte Carlo programs using various parton distribution functions of the photon. The measurements can be interpreted in terms of a resolved photon component that falls with Q2 but remains present at values of Q2 up to 4.5 GeV2. However, none of the models considered gives a good description of the data. (C)",

author = "J. Breitweg and S. Chekanov and M. Derrick and D. Krakauer and S. Magill and B. Musgrave and A. Pellegrino and J. Repond and R. Stanek and R. Yoshida and Mattingly, {M. C.K.} and G. Abbiendi and F. Anselmo 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 G. Castellini and L. Cifarelli and F. Cindolo and A. Contin and N. Coppola and M. Corradi and {De Pasquale}, S. and P. Giusti and G. Iacobucci and G. Laurenti and G. Levi and A. Margotti and T. Massam and R. Nania and F. Palmonari and A. Pesci and A. Polini and G. Sartorelli and {Zamora Garcia}, Y. and A. Zichichi and C. Amelung and A. Bornheim and I. Brock and K. Cob{\"o}ken and J. Crittenden and R. Deffner and H. Hartmann and K. Heinloth and E. Hilger and P. Irrgang and Jakob, {H. P.} and A. Kappes and Katz, {U. F.} and R. Kerger and E. Paul and H. Schnurbusch and A. Stifutkin and J. Tandler and Voss, {K. Ch} and A. Weber and H. Wieber and Bailey, {D. S.} and O. Barret and Brook, {N. H.} and B. Foster and Heath, {G. P.} and Heath, {H. F.} and McFall, {J. D.} and D. Piccioni and E. Rodrigues and J. Scott and Tapper, {R. J.} and M. Capua and A. Mastroberardino and M. Schioppa and G. Susinno",

year = "2000",

month = apr,

day = "20",

doi = "10.1016/S0370-2693(00)00311-7",

language = "English",

volume = "479",

pages = "37--52",

journal = "Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics",

issn = "0370-2693",

publisher = "Elsevier",

number = "1-3",

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Breitweg, J, Chekanov, S, Derrick, M, Krakauer, D, Magill, S, Musgrave, B, Pellegrino, A, Repond, J, Stanek, R, Yoshida, R, Mattingly, MCK, Abbiendi, G, Anselmo, F, Antonioli, P, Bari, G, Basile, M, Bellagamba, L, Boscherini, D, Bruni, A, Bruni, G, Cara Romeo, G, Castellini, G, Cifarelli, L, Cindolo, F, Contin, A, Coppola, N, Corradi, M, De Pasquale, S, Giusti, P, Iacobucci, G, Laurenti, G, Levi, G, Margotti, A, Massam, T, Nania, R, Palmonari, F, Pesci, A, Polini, A, Sartorelli, G, Zamora Garcia, Y, Zichichi, A, Amelung, C, Bornheim, A, Brock, I, Coböken, K, Crittenden, J, Deffner, R, Hartmann, H, Heinloth, K, Hilger, E, Irrgang, P, Jakob, HP, Kappes, A, Katz, UF, Kerger, R, Paul, E, Schnurbusch, H, Stifutkin, A, Tandler, J, Voss, KC, Weber, A, Wieber, H, Bailey, DS, Barret, O, Brook, NH, Foster, B, Heath, GP, Heath, HF, McFall, JD, Piccioni, D, Rodrigues, E, Scott, J, Tapper, RJ, Capua, M, Mastroberardino, A, Schioppa, M & Susinno, G 2000, 'The Q² dependence of dijet cross sections in γp interactions at HERA', Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, vol. 479, n. 1-3, pagg. 37-52. https://doi.org/10.1016/S0370-2693(00)00311-7

TY - JOUR

T1 - The Q2 dependence of dijet cross sections in γp interactions at HERA

AU - Breitweg, J.

AU - Chekanov, S.

AU - Derrick, M.

AU - Krakauer, D.

AU - Magill, S.

AU - Musgrave, B.

AU - Pellegrino, A.

AU - Repond, J.

AU - Stanek, R.

AU - Yoshida, R.

AU - Mattingly, M. C.K.

AU - Abbiendi, G.

AU - Anselmo, F.

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 - Castellini, G.

AU - Cifarelli, L.

AU - Cindolo, F.

AU - Contin, A.

AU - Coppola, N.

AU - Corradi, M.

AU - De Pasquale, S.

AU - Giusti, P.

AU - Iacobucci, G.

AU - Laurenti, G.

AU - Levi, G.

AU - Margotti, A.

AU - Massam, T.

AU - Nania, R.

AU - Palmonari, F.

AU - Pesci, A.

AU - Polini, A.

AU - Sartorelli, G.

AU - Zamora Garcia, Y.

AU - Zichichi, A.

AU - Amelung, C.

AU - Bornheim, A.

AU - Brock, I.

AU - Coböken, K.

AU - Crittenden, J.

AU - Deffner, R.

AU - Hartmann, H.

AU - Heinloth, K.

AU - Hilger, E.

AU - Irrgang, P.

AU - Jakob, H. P.

AU - Kappes, A.

AU - Katz, U. F.

AU - Kerger, R.

AU - Paul, E.

AU - Schnurbusch, H.

AU - Stifutkin, A.

AU - Tandler, J.

AU - Voss, K. Ch

AU - Weber, A.

AU - Wieber, H.

AU - Bailey, D. S.

AU - Barret, O.

AU - Brook, N. H.

AU - Foster, B.

AU - Heath, G. P.

AU - Heath, H. F.

AU - McFall, J. D.

AU - Piccioni, D.

AU - Rodrigues, E.

AU - Scott, J.

AU - Tapper, R. J.

AU - Capua, M.

AU - Mastroberardino, A.

AU - Schioppa, M.

AU - Susinno, G.

PY - 2000/4/20

Y1 - 2000/4/20

N2 - The dependence of the photon structure on the photon virtuality, Q2, is studied by measuring the reaction e+p → e+ + jet + jet + X at photon-proton centre-of-mass energies 134 < W < 223 GeV. Events have been selected in the Q2 ranges ≃ 0 GeV2, 0.1-0.55 GeV2, and 1.5-4.5 GeV2, having two jets with transverse energy E(T)/(jet) > 5.5 GeV in the final state. The dijet cross section has been measured as a function of the fractional momentum of the photon participating in the hard process, x(γ)/(OBS). The ratio of the dijet cross section with x(γ)/(OBS) < 0.75 to that with x(γ)/(OBS) > 0.75 decreases as Q2 increases. The data are compared with the predictions of NLO pQCD and leading-order Monte Carlo programs using various parton distribution functions of the photon. The measurements can be interpreted in terms of a resolved photon component that falls with Q2 but remains present at values of Q2 up to 4.5 GeV2. However, none of the models considered gives a good description of the data. (C)

AB - The dependence of the photon structure on the photon virtuality, Q2, is studied by measuring the reaction e+p → e+ + jet + jet + X at photon-proton centre-of-mass energies 134 < W < 223 GeV. Events have been selected in the Q2 ranges ≃ 0 GeV2, 0.1-0.55 GeV2, and 1.5-4.5 GeV2, having two jets with transverse energy E(T)/(jet) > 5.5 GeV in the final state. The dijet cross section has been measured as a function of the fractional momentum of the photon participating in the hard process, x(γ)/(OBS). The ratio of the dijet cross section with x(γ)/(OBS) < 0.75 to that with x(γ)/(OBS) > 0.75 decreases as Q2 increases. The data are compared with the predictions of NLO pQCD and leading-order Monte Carlo programs using various parton distribution functions of the photon. The measurements can be interpreted in terms of a resolved photon component that falls with Q2 but remains present at values of Q2 up to 4.5 GeV2. However, none of the models considered gives a good description of the data. (C)

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U2 - 10.1016/S0370-2693(00)00311-7

DO - 10.1016/S0370-2693(00)00311-7

M3 - Article

SN - 0370-2693

VL - 479

SP - 37

EP - 52

JO - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics

JF - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics

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