A measurement of σtot(γp) at

Derrick, M.; Krakauer, D.; Magill, S.; Musgrave, B.; Repond, J.; Sugano, K.; Stanek, R. W.; Talaga, R. L.; Thron, J. L.; Arzarello, F.; Ayed, R.; Barbagli, G.; Bari, G.; Basile, M.; Bellagamba, L.; Boscherini, D.; Bruni, G.; Bruni, P.; Romeo, G. Cara; Castellini, G.; Chiarini, M.; Cifarelli, L.; Cindolo, F.; Ciralli, F.; Contin, A.; D’Auria, S.; Papa, C. Del; Frasconi, F.; Giusti, P.; Iacobucci, G.; Laurenti, G.; Levi, G.; Lin, Q.; Lisowski, B.; Maccarrone, G.; Margotti, A.; Massam, T.; Nania, R.; Nemoz, C.; Palmonari, F.; Sartorelli, G.; Timellini, R.; Garcia, Y. Zamora; Zichichi, A.; Bargende, A.; Barreiro, F.; Crittenden, J.; Dabbous, H.; Desch, K.; Diekmann, B.; Geerts, M.; Geitz, G.; Gutjahr, B.; Hartmann, H.; Hartmann, J.; Haun, Daniel B. 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M.; Marini, G.; Mattioli, M.; Monaldi, Daniela; Nigro, A.; Hart, J. C.; McCubbin, N. A.; Shah, T.; Short, T.L.; Barberis, E.; Cartiglia, N.; Heusch, C. A.; Hubbard, B.; Leslie, J. R.; Ng, J. S. T.; O’Shaughnessy, K.; Sadrozinski, H. F-W.; Seiden, A.; Badura, E.; Biltzinger, J.; Chaves, H.; Rost, M.; Seifert, R. J.; Walenta, A.H.; Weihs, W.; Zech, G.; Dagan, S.; Heifetz, R.; Levy, A.; Zer-Zion, D.; Hasegawa, T.; Hazumi, M.; Ishii, T.; Kasai, S.; Kuze, M.; Nagasawa, Yutaka; Nakao, M.; Okuno, Hiroshi; Tokushuku, K.; Watanabe, Takayuki; Yamada, S.; Chiba, M.; Hamatsu, R.; Hirose, T.; Kitamura, S.; Nagayama, S.; Nakamitsu, Y.; Arneodo, M.; Costa, M.; Ferrero, M. I.; Lamberti, Luciano; Maselli, S.; Peroni, C.; Solano, A.; Staiano, A.; Dardo, M.; Bailey, D. C.; Bandyopadhyay, Debades; Bénard, F.; Bhadra, S.; Brkić, M.; Burow, B.D.; Chlebana, F.; Crombie, M.B.; Hartner, G.; Levman, G.; Martin, J. F.; Orr, R. S.; Prentice, J. D.; Sampson, C. R.; Stairs, G.G.; Teuscher, R. J.; Yoon, T. 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doi:10.1016/0370-2693(92)90914-p

Cited by 197 publications

(44 citation statements)

References 27 publications

(30 reference statements)

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“…A detailed description of the ZEUS detector can be found elsewhere [28,29]. A brief outline of the components that are most relevant for this analysis is given below.…”

Section: Experimental Set-upmentioning

confidence: 99%

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Jet-radius dependence of inclusive-jet cross sections in deep inelastic scattering at HERA

Chekanov¹,

Derrick²,

Magill³

et al. 2007

Physics Letters B

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Differential inclusive-jet cross sections have been measured for different jet radii in neutral current deep inelastic ep scattering for boson virtualities Q^2 > 125 GeV^2 with the ZEUS detector at HERA using an integrated luminosity of 81.7 pb^-1. Jets were identified in the Breit frame using the k_T cluster algorithm in the longitudinally inclusive mode for different values of the jet radius R. Differential cross sections are presented as functions of Q^2 and the jet transverse energy, E_T,B^jet. The dependence on R of the inclusive-jet cross section has been measured for Q^2 > 125 and 500 GeV^2 and found to be linear with R in the range studied. Next-to-leading-order QCD calculations give a good description of the measurements for 0.5 <= R <= 1. A value of alpha_s(M_Z) has been extracted from the measurements of the inclusive-jet cross-section dsigma/dQ^2 with R=1 for Q^2 > 500 GeV^2: alpha_s(M_Z) = 0.1207 +-0. AbstractDifferential inclusive-jet cross sections have been measured for different jet radii in neutral current deep inelastic ep scattering for boson virtualities Q 2 > 125 GeV 2 with the ZEUS detector at HERA using an integrated luminosity of 81.7 pb −1 . Jets were identified in the Breit frame using the k T cluster algorithm in the longitudinally inclusive mode for different values of the jet radius R. Differential cross sections are presented as functions of Q 2 and the jet transverse energy, E jet T ,B . The dependence on R of the inclusive-jet cross section has been measured for Q 2 > 125 and 500 GeV 2 and found to be linear with R in the range studied. Next-to-leading-order QCD calculations give a good description of the measurements for 0.5 R 1. A value of α s (M Z ) has been extracted from the measurements of the inclusive-jet cross section dσ/dQ 2 with R = 1 for Q 2 > 500 GeV 2 : α s (M Z ) = 0.1207 ± 0.0014(stat.) +0.0035 −0.0033 (exp.) +0.0022 −0.0023 (th.). The variation of α s with E jet T ,B is in a good agreement with the running of α s as predicted by QCD.

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“…A detailed description of the ZEUS detector can be found elsewhere [28,29]. A brief outline of the components that are most relevant for this analysis is given below.…”

Section: Experimental Set-upmentioning

confidence: 99%

“…27 Also at University of Tokyo, Japan. 28 Supported by the Japanese Ministry of Education, Culture, Sports, Science and Technology (MEXT) and its grants for Scientific Research. 29 Supported by FNRS and its associated funds (IISN and FRIA) and by an Inter-University Attraction Poles Programme subsidised by the Belgian Federal Science Policy Office.…”

mentioning

confidence: 99%

Jet-radius dependence of inclusive-jet cross sections in deep inelastic scattering at HERA

Chekanov¹,

Derrick²,

Magill³

et al. 2007

Physics Letters B

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“…The cross section for hadron production by photons is much less certain, since it involves the hadronic structure of the photon. This has been measured at HERA for photon energies corresponding to E lab = 2 × 10 4 GeV [185,186]. This energy is still well below the energies of the highest energy cosmic rays, but nonetheless, these data do constrain the extrapolation of the cross sections to high energies.…”

Section: B the Muon Componentmentioning

confidence: 80%

High energy physics in the atmosphere: phenomenology of cosmic ray air showers

et al. 2004

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The properties of cosmic rays with energies above 10 6 GeV have to be deduced from the spacetime structure and particle content of the air showers which they initiate. In this review we summarize the phenomenology of these giant air showers. We describe the hadronic interaction models used to extrapolate results from collider data to ultra high energies, and discuss the prospects for insights into forward physics at the LHC. We also describe the main electromagnetic processes that govern the longitudinal shower evolution, as well as the lateral spread of particles. Armed with these two principal shower ingredients and motivation from the underlying physics, we provide an overview of some of the different methods proposed to distinguish primary species. The properties of neutrino interactions and the potential of forthcoming experiments to isolate deeply penetrating showers from baryonic cascades are also discussed. We finally venture into a terra incognita endowed with TeV-scale gravity and explore anomalous neutrino-induced showers.

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“…A detailed description of the ZEUS detector can be found in refs. [13,14]. Here we present a brief description of the components relevant to the present analysis.…”

Section: Experimental Conditionsmentioning

confidence: 99%

Measurement of inclusive $D^{\ast\pm}$ and associated dijet cross sections in photoproduction at HERA

Breitweg

1999

Eur. Phys. J. C

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Inclusive photoproduction of D * ± mesons has been measured for photon-proton centre-of-mass energies in the range 130 < W < 280 GeV and photon virtuality Q 2 < 1 GeV 2 . The data sample used corresponds to an integrated luminosity of 37 pb −1 . Total and differential cross sections as functions of the D * transverse momentum and pseudorapidity are presented in restricted kinematical regions and the data are compared with next-to-leading order (NLO) perturbative QCD calculations using the "massive charm" and "massless charm" schemes. The measured cross sections are generally above the NLO calculations, in particular in the forward (proton) direction. The large data sample also allows the study of dijet production associated with charm. A significant resolved as well as a direct photon component contribute to the cross section. Leading order QCD Monte Carlo calculations indicate that the resolved contribution arises from a significant charm component in the photon. A massive charm NLO parton level calculation yields lower cross sections compared to the measured results in a kinematic region where the resolved photon contribution is significant.

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A measurement of σtot(γp) at

Cited by 197 publications

References 27 publications

Jet-radius dependence of inclusive-jet cross sections in deep inelastic scattering at HERA

Jet-radius dependence of inclusive-jet cross sections in deep inelastic scattering at HERA

High energy physics in the atmosphere: phenomenology of cosmic ray air showers

Measurement of inclusive $D^{\ast\pm}$ and associated dijet cross sections in photoproduction at HERA

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