Diffractive dijet photoproduction in ep collisions at HERA

F. D. Aaron; C. Alexa; V. Andreev; S. Backovic; A. Baghdasaryan; E. Barrelet; W. Bartel; K. Begzsuren; A. Belousov; J. C. Bizot; V. Boudry; I. Bozovic-Jelisavcic; J. Bracinik; G. Brandt; M. Brinkmann; V. Brisson; D. Bruncko; A. Bunyatyan; G. Buschhorn; L. Bystritskaya; A. J. Campbell; K. B. Cantun Avila; K. Cerny; V. Cerny; V. Chekelian; A. Cholewa; J. G. Contreras; J. A. Coughlan; J. Cvach; J. B. Dainton; K. Daum; M. Deák; B. Delcourt; J. Delvax; E. A. De Wolf; C. Diaconu; M. Dobre; V. Dodonov; A. Dossanov; A. Dubak; G. Eckerlin; V. Efremenko; S. Egli; A. Eliseev; E. Elsen; A. Falkiewicz; L. Favart; A. Fedotov; R. Felst; J. Feltesse; J. Ferencei; D. J. Fischer; M. Fleischer; A. Fomenko; E. Gabathuler; J. Gayler; S. Ghazaryan; A. Glazov; L. Goerlich; N. Gogitidze; M. Gouzevitch; C. Grab; A. Grebenyuk; T. Greenshaw; B. R. Grell; G. Grindhammer; S. Habib; D. Haidt; C. Helebrant; R. C.W. Henderson; E. Hennekemper; H. Henschel; M. Herbst; G. Herrera; M. Hildebrandt; K. H. Hiller; D. Hoffmann; R. Horisberger; T. Hreus; F. Huber; M. Jacquet; X. Janssen; L. Jönsson; A. W. Jung; H. Jung; M. Kapichine; J. Katzy; I. R. Kenyon; C. Kiesling; M. Klein; C. Kleinwort; T. Kluge; A. Knutsson; R. Kogler; P. Kostka; M. Kraemer; J. Kretzschmar; A. Kropivnitskaya; K. Krüger; K. Kutak; M. P.J. Landon; W. Lange; G. Laštovička-Medin; P. Laycock; A. Lebedev; V. Lendermann; S. Levonian; K. Lipka; B. List; J. List; N. Loktionova; R. Lopez-Fernandez; V. Lubimov; A. Makankine; E. Malinovski; P. Marage; Ll Marti; H. U. Martyn; S. J. Maxfield; A. Mehta; A. B. Meyer; H. Meyer; J. Meyer; S. Mikocki; I. Milcewicz-Mika; F. Moreau; A. Morozov; J. V. Morris; M. U. Mozer; M. Mudrinic; K. Müller; Th Naumann; P. R. Newman; C. Niebuhr; A. Nikiforov; D. Nikitin; G. Nowak; K. Nowak; J. E. Olsson; S. Osman; D. Ozerov; P. Pahl; V. Palichik; I. Panagoulias; M. Pandurovic; Th Papadopoulou; C. Pascaud; G. D. Patel; E. Perez; A. Petrukhin; I. Picuric; S. Piec; H. Pirumov; D. Pitzl; R. Plačakyte; B. Pokorny; R. Polifka; B. Povh; V. Radescu; N. Raicevic; A. Raspiareza; T. Ravdandorj; P. Reimer; E. Rizvi; P. Robmann; R. Roosen; A. Rostovtsev; M. Rotaru; J. E. Ruiz Tabasco; S. Rusakov; D. Šálek; D. P.C. Sankey; M. Sauter; E. Sauvan; S. Schmitt; L. Schoeffel; A. Schöning; H. C. Schultz-Coulon; F. Sefkow; R. N. Shaw-West; L. N. Shtarkov; S. Shushkevich; T. Sloan; I. Smiljanic; Y. Soloviev; P. Sopicki; D. South; V. Spaskov; A. Specka; Z. Staykova; M. Steder; B. Stella; G. Stoicea; U. Straumann; D. Sunar; T. Sykora; G. Thompson; P. D. Thompson; T. Toll; T. H. Tran; D. Traynor; P. Truöl; I. Tsakov; B. Tseepeldorj; J. Turnau; K. Urban; A. Valkárová; C. Vallée; P. Van Mechelen; A. Vargas Trevino; Y. Vazdik; M. von den Driesch; D. Wegener; E. Wünsch; J. Žáček; J. Zálešák; Z. Zhang; A. Zhokin; H. Zohrabyan; F. Zomer

doi:10.1140/epjc/s10052-010-1448-6

Diffractive dijet photoproduction in ep collisions at HERA

F. D. Aaron
, C. Alexa
, V. Andreev
, S. Backovic
, A. Baghdasaryan
, E. Barrelet
, W. Bartel
, K. Begzsuren
, A. Belousov
, J. C. Bizot
, V. Boudry
, I. Bozovic-Jelisavcic
, J. Bracinik
, G. Brandt
, M. Brinkmann
, V. Brisson
, D. Bruncko
, A. Bunyatyan
, G. Buschhorn
, L. Bystritskaya

A. J. Campbell, K. B. Cantun Avila, K. Cerny, V. Cerny, V. Chekelian, A. Cholewa, J. G. Contreras, J. A. Coughlan, J. Cvach, J. B. Dainton, K. Daum, M. Deák, B. Delcourt, J. Delvax, E. A. De Wolf, C. Diaconu, M. Dobre, V. Dodonov, A. Dossanov, A. Dubak, G. Eckerlin, V. Efremenko, S. Egli, A. Eliseev, E. Elsen, A. Falkiewicz, L. Favart, A. Fedotov, R. Felst, J. Feltesse, J. Ferencei, D. J. Fischer, M. Fleischer, A. Fomenko, E. Gabathuler, J. Gayler, S. Ghazaryan, A. Glazov, L. Goerlich, N. Gogitidze, M. Gouzevitch, C. Grab, A. Grebenyuk, T. Greenshaw, B. R. Grell, G. Grindhammer, S. Habib, D. Haidt, C. Helebrant, R. C.W. Henderson, E. Hennekemper, H. Henschel, M. Herbst, G. Herrera, M. Hildebrandt, K. H. Hiller, D. Hoffmann, R. Horisberger, T. Hreus, F. Huber, M. Jacquet, X. Janssen, L. Jönsson, A. W. Jung, H. Jung, M. Kapichine, J. Katzy, I. R. Kenyon, C. Kiesling, M. Klein, C. Kleinwort, T. Kluge, A. Knutsson, R. Kogler, P. Kostka, M. Kraemer, J. Kretzschmar, A. Kropivnitskaya, K. Krüger, K. Kutak, M. P.J. Landon, W. Lange, G. Laštovička-Medin, P. Laycock, A. Lebedev, V. Lendermann, S. Levonian, K. Lipka, B. List, J. List, N. Loktionova, R. Lopez-Fernandez, V. Lubimov, A. Makankine, E. Malinovski, P. Marage, Ll Marti, H. U. Martyn, S. J. Maxfield, A. Mehta, A. B. Meyer, H. Meyer, J. Meyer, S. Mikocki, I. Milcewicz-Mika, F. Moreau, A. Morozov, J. V. Morris, M. U. Mozer, M. Mudrinic, K. Müller, Th Naumann, P. R. Newman, C. Niebuhr, A. Nikiforov, D. Nikitin, G. Nowak, K. Nowak, J. E. Olsson, S. Osman, D. Ozerov, P. Pahl, V. Palichik, I. Panagoulias, M. Pandurovic, Th Papadopoulou, C. Pascaud, G. D. Patel, E. Perez, A. Petrukhin, I. Picuric, S. Piec, H. Pirumov, D. Pitzl, R. Plačakyte, B. Pokorny, R. Polifka, B. Povh, V. Radescu, N. Raicevic, A. Raspiareza, T. Ravdandorj, P. Reimer, E. Rizvi, P. Robmann, R. Roosen, A. Rostovtsev, M. Rotaru, J. E. Ruiz Tabasco, S. Rusakov, D. Šálek, D. P.C. Sankey, M. Sauter, E. Sauvan, S. Schmitt, L. Schoeffel, A. Schöning, H. C. Schultz-Coulon, F. Sefkow, R. N. Shaw-West, L. N. Shtarkov, S. Shushkevich, T. Sloan, I. Smiljanic, Y. Soloviev, P. Sopicki, D. South, V. Spaskov, A. Specka, Z. Staykova, M. Steder, B. Stella, G. Stoicea, U. Straumann, D. Sunar, T. Sykora, G. Thompson, P. D. Thompson, T. Toll, T. H. Tran, D. Traynor, P. Truöl, I. Tsakov, B. Tseepeldorj, J. Turnau, K. Urban, A. Valkárová, C. Vallée, P. Van Mechelen, A. Vargas Trevino, Y. Vazdik, M. von den Driesch, D. Wegener, E. Wünsch, J. Žáček, J. Zálešák, Z. Zhang, A. Zhokin, H. Zohrabyan, F. Zomer

Horia Hulubei National Institute of Physics and Nuclear Engineering
P.N. Lebedev Physical Institute of the Russian Academy of Sciences
University of Montenegro
Yerevan Physics Institute
Universités Paris VI and VII
c/o DESY
Institute of Physics and Technology of the Mongolian Academy of Sciences
Laboratoire de l'Accélérateur Linéaire
University of Belgrade
University of Birmingham
Universität Hamburg
Institute of Experimental Physics Slovak Academy of Sciences
Max-Planck-Institut für Kernphysik
Max-Planck-Institut für Physik
Institute for Theoretical and Experimental Physics
Dept. Fis. Ap. CINVESTAV
Charles University
CCLRC Rutherford Appleton Laboratory
Institute of Physics of the Czech Academy of Sciences
University of Liverpool
Bergische Universität Gesamthochschule Wuppertal
Inter-University Institute for High Energies ULB-VUB
Aix-Marseille Université
Paul Scherrer Institut
Institute for Nuclear Physics
CEA/UVSQ/CNRS
ETH Zurich
Lancaster University
University of Heidelberg
CINVESTAV-IPN
Lund University
Joint Institute for Nuclear Research, Dubna
Queen Mary University of London
RWTH Aachen University
Physik-Institut der Universität Zürich
University of Dortmund
University Roma Tre
Institute for Nuclear Research and Nuclear Energy Bulgarian Academy of Sciences

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

43 Citations (Scopus)

Abstract

Measurements are presented of single and double-differential dijet cross sections in diffractive photoproduction based on a data sample with an integrated luminosity of 47 pb^-1. The events are of the type ep→eXY, where the hadronic system X contains at least two jets and is separated by a large rapidity gap from the system Y, which consists of a leading proton or low-mass proton excitation. The dijet cross sections are compared with QCD calculations at next-to-leading order and with a Monte Carlo model based on leading order matrix elements with parton showers. The measured cross sections are smaller than those obtained from the next-to-leading order calculations by a factor of about 0.6. This suppression factor has no significant dependence on the fraction x_γ of the photon four-momentum entering the hard subprocess. Ratios of the diffractive to the inclusive dijet cross sections are measured for the first time and are compared with Monte Carlo models.

Original language	English
Pages (from-to)	15-37
Number of pages	23
Journal	European Physical Journal C
Volume	70
Issue number	1
DOIs	https://doi.org/10.1140/epjc/s10052-010-1448-6
Publication status	Published - 1 Jan 2010

Access to Document

10.1140/epjc/s10052-010-1448-6

Cite this

Aaron, F. D., Alexa, C., Andreev, V., Backovic, S., Baghdasaryan, A., Barrelet, E., Bartel, W., Begzsuren, K., Belousov, A., Bizot, J. C., Boudry, V., Bozovic-Jelisavcic, I., Bracinik, J., Brandt, G., Brinkmann, M., Brisson, V., Bruncko, D., Bunyatyan, A., Buschhorn, G., ... Zomer, F. (2010). Diffractive dijet photoproduction in ep collisions at HERA. European Physical Journal C, 70(1), 15-37. https://doi.org/10.1140/epjc/s10052-010-1448-6

@article{271ff59df49542ee92812e64d848499b,

title = "Diffractive dijet photoproduction in ep collisions at HERA",

abstract = "Measurements are presented of single and double-differential dijet cross sections in diffractive photoproduction based on a data sample with an integrated luminosity of 47 pb-1. The events are of the type ep→eXY, where the hadronic system X contains at least two jets and is separated by a large rapidity gap from the system Y, which consists of a leading proton or low-mass proton excitation. The dijet cross sections are compared with QCD calculations at next-to-leading order and with a Monte Carlo model based on leading order matrix elements with parton showers. The measured cross sections are smaller than those obtained from the next-to-leading order calculations by a factor of about 0.6. This suppression factor has no significant dependence on the fraction xγ of the photon four-momentum entering the hard subprocess. Ratios of the diffractive to the inclusive dijet cross sections are measured for the first time and are compared with Monte Carlo models.",

author = "Aaron, \{F. D.\} and C. Alexa and V. Andreev and S. Backovic and A. Baghdasaryan and E. Barrelet and W. Bartel and K. Begzsuren and A. Belousov and Bizot, \{J. C.\} and V. Boudry and I. Bozovic-Jelisavcic and J. Bracinik and G. Brandt and M. Brinkmann and V. Brisson and D. Bruncko and A. Bunyatyan and G. Buschhorn and L. Bystritskaya and Campbell, \{A. J.\} and \{Cantun Avila\}, \{K. B.\} and K. Cerny and V. Cerny and V. Chekelian and A. Cholewa and Contreras, \{J. G.\} and Coughlan, \{J. A.\} and J. Cvach and Dainton, \{J. B.\} and K. Daum and M. De{\'a}k and B. Delcourt and J. Delvax and \{De Wolf\}, \{E. A.\} and C. Diaconu and M. Dobre and V. Dodonov and A. Dossanov and A. Dubak and G. Eckerlin and V. Efremenko and S. Egli and A. Eliseev and E. Elsen and A. Falkiewicz and L. Favart and A. Fedotov and R. Felst and J. Feltesse and J. Ferencei and Fischer, \{D. J.\} and M. Fleischer and A. Fomenko and E. Gabathuler and J. Gayler and S. Ghazaryan and A. Glazov and L. Goerlich and N. Gogitidze and M. Gouzevitch and C. Grab and A. Grebenyuk and T. Greenshaw and Grell, \{B. R.\} and G. Grindhammer and S. Habib and D. Haidt and C. Helebrant and Henderson, \{R. C.W.\} and E. Hennekemper and H. Henschel and M. Herbst and G. Herrera and M. Hildebrandt and Hiller, \{K. H.\} and D. Hoffmann and R. Horisberger and T. Hreus and F. Huber and M. Jacquet and X. Janssen and L. J{\"o}nsson and Jung, \{A. W.\} and H. Jung and M. Kapichine and J. Katzy and Kenyon, \{I. R.\} and C. Kiesling and M. Klein and C. Kleinwort and T. Kluge and A. Knutsson and R. Kogler and P. Kostka and M. Kraemer and J. Kretzschmar and A. Kropivnitskaya and K. Kr{\"u}ger and K. Kutak and Landon, \{M. P.J.\} and W. Lange and G. La{\v s}tovi{\v c}ka-Medin and P. Laycock and A. Lebedev and V. Lendermann and S. Levonian and K. Lipka and B. List and J. List and N. Loktionova and R. Lopez-Fernandez and V. Lubimov and A. Makankine and E. Malinovski and P. Marage and Ll Marti and Martyn, \{H. U.\} and Maxfield, \{S. J.\} and A. Mehta and Meyer, \{A. B.\} and H. Meyer and J. Meyer and S. Mikocki and I. Milcewicz-Mika and F. Moreau and A. Morozov and Morris, \{J. V.\} and Mozer, \{M. U.\} and M. Mudrinic and K. M{\"u}ller and Th Naumann and Newman, \{P. R.\} and C. Niebuhr and A. Nikiforov and D. Nikitin and G. Nowak and K. Nowak and Olsson, \{J. E.\} and S. Osman and D. Ozerov and P. Pahl and V. Palichik and I. Panagoulias and M. Pandurovic and Th Papadopoulou and C. Pascaud and Patel, \{G. D.\} and E. Perez and A. Petrukhin and I. Picuric and S. Piec and H. Pirumov and D. Pitzl and R. Pla{\v c}akyte and B. Pokorny and R. Polifka and B. Povh and V. Radescu and N. Raicevic and A. Raspiareza and T. Ravdandorj and P. Reimer and E. Rizvi and P. Robmann and R. Roosen and A. Rostovtsev and M. Rotaru and \{Ruiz Tabasco\}, \{J. E.\} and S. Rusakov and D. {\v S}{\'a}lek and Sankey, \{D. P.C.\} and M. Sauter and E. Sauvan and S. Schmitt and L. Schoeffel and A. Sch{\"o}ning and Schultz-Coulon, \{H. C.\} and F. Sefkow and Shaw-West, \{R. N.\} and Shtarkov, \{L. N.\} and S. Shushkevich and T. Sloan and I. Smiljanic and Y. Soloviev and P. Sopicki and D. South and V. Spaskov and A. Specka and Z. Staykova and M. Steder and B. Stella and G. Stoicea and U. Straumann and D. Sunar and T. Sykora and G. Thompson and Thompson, \{P. D.\} and T. Toll and Tran, \{T. H.\} and D. Traynor and P. Tru{\"o}l and I. Tsakov and B. Tseepeldorj and J. Turnau and K. Urban and A. Valk{\'a}rov{\'a} and C. Vall{\'e}e and \{Van Mechelen\}, P. and Trevino, \{A. Vargas\} and Y. Vazdik and \{von den Driesch\}, M. and D. Wegener and E. W{\"u}nsch and J. {\v Z}{\'a}{\v c}ek and J. Z{\'a}le{\v s}{\'a}k and Z. Zhang and A. Zhokin and H. Zohrabyan and F. Zomer",

year = "2010",

month = jan,

day = "1",

doi = "10.1140/epjc/s10052-010-1448-6",

language = "English",

volume = "70",

pages = "15--37",

journal = "European Physical Journal C",

issn = "1434-6044",

publisher = "Springer Nature",

number = "1",

}

Aaron, FD, Alexa, C, Andreev, V, Backovic, S, Baghdasaryan, A, Barrelet, E, Bartel, W, Begzsuren, K, Belousov, A, Bizot, JC, Boudry, V, Bozovic-Jelisavcic, I, Bracinik, J, Brandt, G, Brinkmann, M, Brisson, V, Bruncko, D, Bunyatyan, A, Buschhorn, G, Bystritskaya, L, Campbell, AJ, Cantun Avila, KB, Cerny, K, Cerny, V, Chekelian, V, Cholewa, A, Contreras, JG, Coughlan, JA, Cvach, J, Dainton, JB, Daum, K, Deák, M, Delcourt, B, Delvax, J, De Wolf, EA, Diaconu, C, Dobre, M, Dodonov, V, Dossanov, A, Dubak, A, Eckerlin, G, Efremenko, V, Egli, S, Eliseev, A, Elsen, E, Falkiewicz, A, Favart, L, Fedotov, A, Felst, R, Feltesse, J, Ferencei, J, Fischer, DJ, Fleischer, M, Fomenko, A, Gabathuler, E, Gayler, J, Ghazaryan, S, Glazov, A, Goerlich, L, Gogitidze, N, Gouzevitch, M, Grab, C, Grebenyuk, A, Greenshaw, T, Grell, BR, Grindhammer, G, Habib, S, Haidt, D, Helebrant, C, Henderson, RCW, Hennekemper, E, Henschel, H, Herbst, M, Herrera, G, Hildebrandt, M, Hiller, KH, Hoffmann, D, Horisberger, R, Hreus, T, Huber, F, Jacquet, M, Janssen, X, Jönsson, L, Jung, AW, Jung, H, Kapichine, M, Katzy, J, Kenyon, IR, Kiesling, C, Klein, M, Kleinwort, C, Kluge, T, Knutsson, A, Kogler, R, Kostka, P, Kraemer, M, Kretzschmar, J, Kropivnitskaya, A, Krüger, K, Kutak, K, Landon, MPJ, Lange, W, Laštovička-Medin, G, Laycock, P, Lebedev, A, Lendermann, V, Levonian, S, Lipka, K, List, B, List, J, Loktionova, N, Lopez-Fernandez, R, Lubimov, V, Makankine, A, Malinovski, E, Marage, P, Marti, L, Martyn, HU, Maxfield, SJ, Mehta, A, Meyer, AB, Meyer, H, Meyer, J, Mikocki, S, Milcewicz-Mika, I, Moreau, F, Morozov, A, Morris, JV, Mozer, MU, Mudrinic, M, Müller, K, Naumann, T, Newman, PR, Niebuhr, C, Nikiforov, A, Nikitin, D, Nowak, G, Nowak, K, Olsson, JE, Osman, S, Ozerov, D, Pahl, P, Palichik, V, Panagoulias, I, Pandurovic, M, Papadopoulou, T, Pascaud, C, Patel, GD, Perez, E, Petrukhin, A, Picuric, I, Piec, S, Pirumov, H, Pitzl, D, Plačakyte, R, Pokorny, B, Polifka, R, Povh, B, Radescu, V, Raicevic, N, Raspiareza, A, Ravdandorj, T, Reimer, P, Rizvi, E, Robmann, P, Roosen, R, Rostovtsev, A, Rotaru, M, Ruiz Tabasco, JE, Rusakov, S, Šálek, D, Sankey, DPC, Sauter, M, Sauvan, E, Schmitt, S, Schoeffel, L, Schöning, A, Schultz-Coulon, HC, Sefkow, F, Shaw-West, RN, Shtarkov, LN, Shushkevich, S, Sloan, T, Smiljanic, I, Soloviev, Y, Sopicki, P, South, D, Spaskov, V, Specka, A, Staykova, Z, Steder, M, Stella, B, Stoicea, G, Straumann, U, Sunar, D, Sykora, T, Thompson, G, Thompson, PD, Toll, T, Tran, TH, Traynor, D, Truöl, P, Tsakov, I, Tseepeldorj, B, Turnau, J, Urban, K, Valkárová, A, Vallée, C, Van Mechelen, P, Trevino, AV, Vazdik, Y, von den Driesch, M, Wegener, D, Wünsch, E, Žáček, J, Zálešák, J, Zhang, Z, Zhokin, A, Zohrabyan, H & Zomer, F 2010, 'Diffractive dijet photoproduction in ep collisions at HERA', European Physical Journal C, vol. 70, no. 1, pp. 15-37. https://doi.org/10.1140/epjc/s10052-010-1448-6

TY - JOUR

T1 - Diffractive dijet photoproduction in ep collisions at HERA

AU - Aaron, F. D.

AU - Alexa, C.

AU - Andreev, V.

AU - Backovic, S.

AU - Baghdasaryan, A.

AU - Barrelet, E.

AU - Bartel, W.

AU - Begzsuren, K.

AU - Belousov, A.

AU - Bizot, J. C.

AU - Boudry, V.

AU - Bozovic-Jelisavcic, I.

AU - Bracinik, J.

AU - Brandt, G.

AU - Brinkmann, M.

AU - Brisson, V.

AU - Bruncko, D.

AU - Bunyatyan, A.

AU - Buschhorn, G.

AU - Bystritskaya, L.

AU - Campbell, A. J.

AU - Cantun Avila, K. B.

AU - Cerny, K.

AU - Cerny, V.

AU - Chekelian, V.

AU - Cholewa, A.

AU - Contreras, J. G.

AU - Coughlan, J. A.

AU - Cvach, J.

AU - Dainton, J. B.

AU - Daum, K.

AU - Deák, M.

AU - Delcourt, B.

AU - Delvax, J.

AU - De Wolf, E. A.

AU - Diaconu, C.

AU - Dobre, M.

AU - Dodonov, V.

AU - Dossanov, A.

AU - Dubak, A.

AU - Eckerlin, G.

AU - Efremenko, V.

AU - Egli, S.

AU - Eliseev, A.

AU - Elsen, E.

AU - Falkiewicz, A.

AU - Favart, L.

AU - Fedotov, A.

AU - Felst, R.

AU - Feltesse, J.

AU - Ferencei, J.

AU - Fischer, D. J.

AU - Fleischer, M.

AU - Fomenko, A.

AU - Gabathuler, E.

AU - Gayler, J.

AU - Ghazaryan, S.

AU - Glazov, A.

AU - Goerlich, L.

AU - Gogitidze, N.

AU - Gouzevitch, M.

AU - Grab, C.

AU - Grebenyuk, A.

AU - Greenshaw, T.

AU - Grell, B. R.

AU - Grindhammer, G.

AU - Habib, S.

AU - Haidt, D.

AU - Helebrant, C.

AU - Henderson, R. C.W.

AU - Hennekemper, E.

AU - Henschel, H.

AU - Herbst, M.

AU - Herrera, G.

AU - Hildebrandt, M.

AU - Hiller, K. H.

AU - Hoffmann, D.

AU - Horisberger, R.

AU - Hreus, T.

AU - Huber, F.

AU - Jacquet, M.

AU - Janssen, X.

AU - Jönsson, L.

AU - Jung, A. W.

AU - Jung, H.

AU - Kapichine, M.

AU - Katzy, J.

AU - Kenyon, I. R.

AU - Kiesling, C.

AU - Klein, M.

AU - Kleinwort, C.

AU - Kluge, T.

AU - Knutsson, A.

AU - Kogler, R.

AU - Kostka, P.

AU - Kraemer, M.

AU - Kretzschmar, J.

AU - Kropivnitskaya, A.

AU - Krüger, K.

AU - Kutak, K.

AU - Landon, M. P.J.

AU - Lange, W.

AU - Laštovička-Medin, G.

AU - Laycock, P.

AU - Lebedev, A.

AU - Lendermann, V.

AU - Levonian, S.

AU - Lipka, K.

AU - List, B.

AU - List, J.

AU - Loktionova, N.

AU - Lopez-Fernandez, R.

AU - Lubimov, V.

AU - Makankine, A.

AU - Malinovski, E.

AU - Marage, P.

AU - Marti, Ll

AU - Martyn, H. U.

AU - Maxfield, S. J.

AU - Mehta, A.

AU - Meyer, A. B.

AU - Meyer, H.

AU - Meyer, J.

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PY - 2010/1/1

Y1 - 2010/1/1

N2 - Measurements are presented of single and double-differential dijet cross sections in diffractive photoproduction based on a data sample with an integrated luminosity of 47 pb-1. The events are of the type ep→eXY, where the hadronic system X contains at least two jets and is separated by a large rapidity gap from the system Y, which consists of a leading proton or low-mass proton excitation. The dijet cross sections are compared with QCD calculations at next-to-leading order and with a Monte Carlo model based on leading order matrix elements with parton showers. The measured cross sections are smaller than those obtained from the next-to-leading order calculations by a factor of about 0.6. This suppression factor has no significant dependence on the fraction xγ of the photon four-momentum entering the hard subprocess. Ratios of the diffractive to the inclusive dijet cross sections are measured for the first time and are compared with Monte Carlo models.

AB - Measurements are presented of single and double-differential dijet cross sections in diffractive photoproduction based on a data sample with an integrated luminosity of 47 pb-1. The events are of the type ep→eXY, where the hadronic system X contains at least two jets and is separated by a large rapidity gap from the system Y, which consists of a leading proton or low-mass proton excitation. The dijet cross sections are compared with QCD calculations at next-to-leading order and with a Monte Carlo model based on leading order matrix elements with parton showers. The measured cross sections are smaller than those obtained from the next-to-leading order calculations by a factor of about 0.6. This suppression factor has no significant dependence on the fraction xγ of the photon four-momentum entering the hard subprocess. Ratios of the diffractive to the inclusive dijet cross sections are measured for the first time and are compared with Monte Carlo models.

U2 - 10.1140/epjc/s10052-010-1448-6

DO - 10.1140/epjc/s10052-010-1448-6

M3 - Article

AN - SCOPUS:78449289477

SN - 1434-6044

VL - 70

SP - 15

EP - 37

JO - European Physical Journal C

JF - European Physical Journal C

IS - 1

ER -

Diffractive dijet photoproduction in ep collisions at HERA

Abstract

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