Tests of QCD factorisation in the diffractive production of dijets in deep-inelastic scattering and photoproduction at HERA

A. Aktas; V. Andreev; T. Anthonis; B. Antunovic; S. Aplin; A. Asmone; A. Astvatsatourov; A. Babaev; S. Backovic; A. Baghdasaryan; P. Baranov; E. Barrelet; W. Bartel; S. Baudrand; M. Beckingham; K. Begzsuren; O. Behnke; O. Behrendt; A. Belousov; N. Berger; J. C. Bizot; M. O. Boenig; V. Boudry; I. Bozovic-Jelisavcic; J. Bracinik; G. Brandt; M. Brinkmann; V. Brisson; D. Bruncko; F. W. Büsser; A. Bunyatyan; G. Buschhorn; L. Bystritskaya; A. J. Campbell; K. B. Cantun Avila; F. Cassol-Brunner; K. Cerny; V. Cerny; V. Chekelian; A. Cholewa; J. G. Contreras; J. A. Coughlan; G. Cozzika; J. Cvach; J. B. Dainton; K. Daum; Y. De Boer; B. Delcourt; M. Del Degan; A. De Roeck; E. A. De Wolf; C. Diaconu; V. Dodonov; A. Dubak; G. Eckerlin; V. Efremenko; S. Egli; R. Eichler; F. Eisele; A. Eliseev; E. Elsen; S. Essenov; A. Falkewicz; P. J.W. Faulkner; L. Favart; A. Fedotov; R. Felst; J. Feltesse; J. Ferencei; L. Finke; M. Fleischer; G. Flucke; A. Fomenko; G. Franke; T. Frisson; E. Gabathuler; E. Garutti; J. Gayler; S. Ghazaryan; S. Ginzburgskaya; A. Glazov; I. Glushkov; L. Goerlich; M. Goettlich; N. Gogitidze; S. Gorbounov; M. Gouzevitch; C. Grab; T. Greenshaw; M. Gregori; B. R. Grell; G. Grindhammer; S. Habib; D. Haidt; M. Hansson; G. Heinzelmann; C. Helebrant; R. C.W. Henderson; H. Henschel; G. Herrera; M. Hildebrandt; K. H. Hiller; D. Hoffmann; R. Horisberger; A. Hovhannisyan; T. Hreus; S. Hussain; M. Jacquet; X. Janssen; V. Jemanov; L. Jönsson; D. P. Johnson; A. W. Jung; H. Jung; M. Kapichine; J. Katzy; I. R. Kenyon; C. Kiesling; M. Klein; C. Kleinwort; T. Klimkovich; T. Kluge; G. Knies; A. Knutsson; V. Korbel; P. Kostka; M. Kraemer; K. Krastev; J. Kretzschmar; A. Kropivnitskaya; K. Krüger; M. P.J. Landon; W. Lange; G. Laštovička-Medin; P. Laycock; A. Lebedev; G. Leibenguth; V. Lendermann; S. Levonian; L. Lindfeld; K. Lipka; A. Liptaj; B. List; J. List; N. Loktionova; R. Lopez-Fernandez; V. Lubimov; A. I. Lucaci-Timoce; H. Lueders; L. Lytkin; A. Makankine; E. Malinovski; P. Marage; L. Marti; M. Martisikova; H. U. Martyn; S. J. Maxfield; A. Mehta; K. Meier; A. B. Meyer; H. Meyer; J. Meyer; V. Michels; S. Mikocki; I. Milcewicz-Mika; D. Mladenov; A. Mohamed; F. Moreau; A. Morozov; J. V. Morris; M. U. Mozer; K. Müller; P. Murín; K. Nankov; B. Naroska; T. Naumann; P. R. Newman; C. Niebuhr; A. Nikiforov; G. Nowak; K. Nowak; M. Nozicka; R. Oganezov; B. Olivier; J. E. Olsson; S. Osman; D. Ozerov; V. Palichik; I. Panagoulias; M. Pandurovic; T. Papadopoulou; C. Pascaud; G. D. Patel; H. Peng; E. Perez; D. Perez-Astudillo; A. Perieanu; A. Petrukhin; I. Picuric; S. Piec; D. Pitzl; R. Plačakyte; B. Povh; P. Prideaux; A. J. Rahmat; N. Raicevic; P. Reimer; A. Rimmer; C. Risler; E. Rizvi; P. Robmann; B. Roland; R. Roosen; A. Rostovtsev; Z. Rurikova; S. Rusakov; F. Salvaire; D. P.C. Sankey; M. Sauter; E. Sauvan; S. Schätzel; S. Schmidt; S. Schmitt; C. Schmitz; L. Schoeffel; A. Schöning; H. C. Schultz-Coulon; F. Sefkow; R. N. Shaw-West; I. Sheviakov; L. N. Shtarkov; T. Sloan; I. Smiljanic; P. Smirnov; Y. Soloviev; D. South; V. Spaskov; A. Specka; M. Steder; B. Stella; J. Stiewe; A. Stoilov; U. Straumann; D. Sunar; T. Sykora; V. Tchoulakov; G. Thompson; P. D. Thompson; T. Toll; F. Tomasz; D. Traynor; T. N. Trinh; P. Truöl; I. Tsakov; G. Tsipolitis; I. Tsurin; J. Turnau; E. Tzamariudaki; K. Urban; A. Usik; D. Utkin; A. Valkárová; C. Vallée; P. Van Mechelen; A. Vargas Trevino; Y. Vazdik; S. Vinokurova; V. Volchinski; K. Wacker; G. Weber; R. Weber; D. Wegener; C. Werner; M. Wessels; C. Wissing; R. Wolf; E. Wünsch; S. Xella; W. Yan; V. Yeganov; J. Žáček; J. Zálešák; Z. Zhang; A. Zhelezov; A. Zhokin; Y. C. Zhu; J. Zimmermann; T. Zimmermann; H. Zohrabyan; F. Zomer

doi:10.1140/epjc/s10052-007-0325-4

Tests of QCD factorisation in the diffractive production of dijets in deep-inelastic scattering and photoproduction at HERA

A. Aktas^*, V. Andreev, T. Anthonis, B. Antunovic, S. Aplin, A. Asmone, A. Astvatsatourov, A. Babaev, S. Backovic, A. Baghdasaryan, P. Baranov, E. Barrelet, W. Bartel, S. Baudrand, M. Beckingham, K. Begzsuren, O. Behnke, O. Behrendt, A. Belousov, N. BergerJ. C. Bizot, M. O. Boenig, V. Boudry, I. Bozovic-Jelisavcic, J. Bracinik, G. Brandt, M. Brinkmann, V. Brisson, D. Bruncko, F. W. Büsser, A. Bunyatyan, G. Buschhorn, L. Bystritskaya, A. J. Campbell, K. B. Cantun Avila, F. Cassol-Brunner, K. Cerny, V. Cerny, V. Chekelian, A. Cholewa, J. G. Contreras, J. A. Coughlan, G. Cozzika, J. Cvach, J. B. Dainton, K. Daum, Y. De Boer, B. Delcourt, M. Del Degan, A. De Roeck, E. A. De Wolf, C. Diaconu, V. Dodonov, A. Dubak, G. Eckerlin, V. Efremenko, S. Egli, R. Eichler, F. Eisele, A. Eliseev, E. Elsen, S. Essenov, A. Falkewicz, P. J.W. Faulkner, L. Favart, A. Fedotov, R. Felst, J. Feltesse, J. Ferencei, L. Finke, M. Fleischer, G. Flucke, A. Fomenko, G. Franke, T. Frisson, E. Gabathuler, E. Garutti, J. Gayler, S. Ghazaryan, S. Ginzburgskaya, A. Glazov, I. Glushkov, L. Goerlich, M. Goettlich, N. Gogitidze, S. Gorbounov, M. Gouzevitch, C. Grab, T. Greenshaw, M. Gregori, B. R. Grell, G. Grindhammer, S. Habib, D. Haidt, M. Hansson, G. Heinzelmann, C. Helebrant, R. C.W. Henderson, H. Henschel, G. Herrera, M. Hildebrandt, K. H. Hiller, D. Hoffmann, R. Horisberger, A. Hovhannisyan, T. Hreus, S. Hussain, M. Jacquet, X. Janssen, V. Jemanov, L. Jönsson, D. P. Johnson, A. W. Jung, H. Jung, M. Kapichine, J. Katzy, I. R. Kenyon, C. Kiesling, M. Klein, C. Kleinwort, T. Klimkovich, T. Kluge, G. Knies, A. Knutsson, V. Korbel, P. Kostka, M. Kraemer, K. Krastev, J. Kretzschmar, A. Kropivnitskaya, K. Krüger, M. P.J. Landon, W. Lange, G. Laštovička-Medin, P. Laycock, A. Lebedev, G. Leibenguth, V. Lendermann, S. Levonian, L. Lindfeld, K. Lipka, A. Liptaj, B. List, J. List, N. Loktionova, R. Lopez-Fernandez, V. Lubimov, A. I. Lucaci-Timoce, H. Lueders, L. Lytkin, A. Makankine, E. Malinovski, P. Marage, L. Marti, M. Martisikova, H. U. Martyn, S. J. Maxfield, A. Mehta, K. Meier, A. B. Meyer, H. Meyer, J. Meyer, V. Michels, S. Mikocki, I. Milcewicz-Mika, D. Mladenov, A. Mohamed, F. Moreau, A. Morozov, J. V. Morris, M. U. Mozer, K. Müller, P. Murín, K. Nankov, B. Naroska, T. Naumann, P. R. Newman, C. Niebuhr, A. Nikiforov, G. Nowak, K. Nowak, M. Nozicka, R. Oganezov, B. Olivier, J. E. Olsson, S. Osman, D. Ozerov, V. Palichik, I. Panagoulias, M. Pandurovic, T. Papadopoulou, C. Pascaud, G. D. Patel, H. Peng, E. Perez, D. Perez-Astudillo, A. Perieanu, A. Petrukhin, I. Picuric, S. Piec, D. Pitzl, R. Plačakyte, B. Povh, P. Prideaux, A. J. Rahmat, N. Raicevic, P. Reimer, A. Rimmer, C. Risler, E. Rizvi, P. Robmann, B. Roland, R. Roosen, A. Rostovtsev, Z. Rurikova, S. Rusakov, F. Salvaire, D. P.C. Sankey, M. Sauter, E. Sauvan, S. Schätzel, S. Schmidt, S. Schmitt, C. Schmitz, L. Schoeffel, A. Schöning, H. C. Schultz-Coulon, F. Sefkow, R. N. Shaw-West, I. Sheviakov, L. N. Shtarkov, T. Sloan, I. Smiljanic, P. Smirnov, Y. Soloviev, D. South, V. Spaskov, A. Specka, M. Steder, B. Stella, J. Stiewe, A. Stoilov, U. Straumann, D. Sunar, T. Sykora, V. Tchoulakov, G. Thompson, P. D. Thompson, T. Toll, F. Tomasz, D. Traynor, T. N. Trinh, P. Truöl, I. Tsakov, G. Tsipolitis, I. Tsurin, J. Turnau, E. Tzamariudaki, K. Urban, A. Usik, D. Utkin, A. Valkárová, C. Vallée, P. Van Mechelen, A. Vargas Trevino, Y. Vazdik, S. Vinokurova, V. Volchinski, K. Wacker, G. Weber, R. Weber, D. Wegener, C. Werner, M. Wessels, C. Wissing, R. Wolf, E. Wünsch, S. Xella, W. Yan, V. Yeganov, J. Žáček, J. Zálešák, Z. Zhang, A. Zhelezov, A. Zhokin, Y. C. Zhu, J. Zimmermann, T. Zimmermann, H. Zohrabyan, F. Zomer

^*Corresponding author for this work

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

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Abstract

Measurements are presented of differential dijet cross sections in diffractive photoproduction (Q²<0.01 GeV²) and deep-inelastic scattering processes (DIS, 4<Q²<80 GeV ²). The event topology is given by ep→eXY, in which the system X, containing at least two jets, is separated from a leading low-mass baryonic system Y by a large rapidity gap. The dijet cross sections are compared with NLO QCD predictions based on diffractive parton densities previously obtained from a QCD analysis of inclusive diffractive DIS cross sections by H1. In DIS, the dijet data are well described, supporting the validity of QCD factorisation. The diffractive DIS dijet data are more sensitive to the diffractive gluon density at high fractional parton momentum than the measurements of inclusive diffractive DIS. In photoproduction, the predicted dijet cross section has to be multiplied by a factor of approximately 0.5 for both direct and resolved photon interactions to describe the measurements. The ratio of measured dijet cross section to NLO prediction in photoproduction is a factor 0.5±0.1 smaller than the same ratio in DIS. This suppression is the first clear observation of QCD hard scattering factorisation breaking at HERA. The measurements are also compared to the two soft colour neutralisation models SCI and GAL. The SCI model describes diffractive dijet production in DIS but not in photoproduction. The GAL model fails in both kinematic regions.

Original language	English
Pages (from-to)	549-568
Number of pages	20
Journal	European Physical Journal C
Volume	51
Issue number	3
DOIs	https://doi.org/10.1140/epjc/s10052-007-0325-4
Publication status	Published - Aug 2007
Externally published	Yes

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10.1140/epjc/s10052-007-0325-4

Cite this

Aktas, A., Andreev, V., Anthonis, T., Antunovic, B., Aplin, S., Asmone, A., Astvatsatourov, A., Babaev, A., Backovic, S., Baghdasaryan, A., Baranov, P., Barrelet, E., Bartel, W., Baudrand, S., Beckingham, M., Begzsuren, K., Behnke, O., Behrendt, O., Belousov, A., ... Zomer, F. (2007). Tests of QCD factorisation in the diffractive production of dijets in deep-inelastic scattering and photoproduction at HERA. European Physical Journal C, 51(3), 549-568. https://doi.org/10.1140/epjc/s10052-007-0325-4

@article{10f46de5a9014379a4967a5b27f415de,

title = "Tests of QCD factorisation in the diffractive production of dijets in deep-inelastic scattering and photoproduction at HERA",

abstract = "Measurements are presented of differential dijet cross sections in diffractive photoproduction (Q2<0.01 GeV2) and deep-inelastic scattering processes (DIS, 42<80 GeV 2). The event topology is given by ep→eXY, in which the system X, containing at least two jets, is separated from a leading low-mass baryonic system Y by a large rapidity gap. The dijet cross sections are compared with NLO QCD predictions based on diffractive parton densities previously obtained from a QCD analysis of inclusive diffractive DIS cross sections by H1. In DIS, the dijet data are well described, supporting the validity of QCD factorisation. The diffractive DIS dijet data are more sensitive to the diffractive gluon density at high fractional parton momentum than the measurements of inclusive diffractive DIS. In photoproduction, the predicted dijet cross section has to be multiplied by a factor of approximately 0.5 for both direct and resolved photon interactions to describe the measurements. The ratio of measured dijet cross section to NLO prediction in photoproduction is a factor 0.5±0.1 smaller than the same ratio in DIS. This suppression is the first clear observation of QCD hard scattering factorisation breaking at HERA. The measurements are also compared to the two soft colour neutralisation models SCI and GAL. The SCI model describes diffractive dijet production in DIS but not in photoproduction. The GAL model fails in both kinematic regions.",

author = "A. Aktas and V. Andreev and T. Anthonis and B. Antunovic and S. Aplin and A. Asmone and A. Astvatsatourov and A. Babaev and S. Backovic and A. Baghdasaryan and P. Baranov and E. Barrelet and W. Bartel and S. Baudrand and M. Beckingham and K. Begzsuren and O. Behnke and O. Behrendt and A. Belousov and N. Berger and Bizot, {J. C.} and Boenig, {M. O.} and V. Boudry and I. Bozovic-Jelisavcic and J. Bracinik and G. Brandt and M. Brinkmann and V. Brisson and D. Bruncko and B{\"u}sser, {F. W.} and A. Bunyatyan and G. Buschhorn and L. Bystritskaya and Campbell, {A. J.} and {Cantun Avila}, {K. B.} and F. Cassol-Brunner and K. Cerny and V. Cerny and V. Chekelian and A. Cholewa and Contreras, {J. G.} and Coughlan, {J. A.} and G. Cozzika and J. Cvach and Dainton, {J. B.} and K. Daum and {De Boer}, Y. and B. Delcourt and {Del Degan}, M. and {De Roeck}, A. and {De Wolf}, {E. A.} and C. Diaconu and V. Dodonov and A. Dubak and G. Eckerlin and V. Efremenko and S. Egli and R. Eichler and F. Eisele and A. Eliseev and E. Elsen and S. Essenov and A. Falkewicz and Faulkner, {P. J.W.} and L. Favart and A. Fedotov and R. Felst and J. Feltesse and J. Ferencei and L. Finke and M. Fleischer and G. Flucke and A. Fomenko and G. Franke and T. Frisson and E. Gabathuler and E. Garutti and J. Gayler and S. Ghazaryan and S. Ginzburgskaya and A. Glazov and I. Glushkov and L. Goerlich and M. Goettlich and N. Gogitidze and S. Gorbounov and M. Gouzevitch and C. Grab and T. Greenshaw and M. Gregori and Grell, {B. R.} and G. Grindhammer and S. Habib and D. Haidt and M. Hansson and G. Heinzelmann and C. Helebrant and Henderson, {R. C.W.} and H. Henschel and G. Herrera and M. Hildebrandt and Hiller, {K. H.} and D. Hoffmann and R. Horisberger and A. Hovhannisyan and T. Hreus and S. Hussain and M. Jacquet and X. Janssen and V. Jemanov and L. J{\"o}nsson and Johnson, {D. P.} 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. Klimkovich and T. Kluge and G. Knies and A. Knutsson and V. Korbel and P. Kostka and M. Kraemer and K. Krastev and J. Kretzschmar and A. Kropivnitskaya and K. Kr{\"u}ger 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 G. Leibenguth and V. Lendermann and S. Levonian and L. Lindfeld and K. Lipka and A. Liptaj and B. List and J. List and N. Loktionova and R. Lopez-Fernandez and V. Lubimov and Lucaci-Timoce, {A. I.} and H. Lueders and L. Lytkin and A. Makankine and E. Malinovski and P. Marage and L. Marti and M. Martisikova and Martyn, {H. U.} and Maxfield, {S. J.} and A. Mehta and K. Meier and Meyer, {A. B.} and H. Meyer and J. Meyer and V. Michels and S. Mikocki and I. Milcewicz-Mika and D. Mladenov and A. Mohamed and F. Moreau and A. Morozov and Morris, {J. V.} and Mozer, {M. U.} and K. M{\"u}ller and P. Mur{\'i}n and K. Nankov and B. Naroska and T. Naumann and Newman, {P. R.} and C. Niebuhr and A. Nikiforov and G. Nowak and K. Nowak and M. Nozicka and R. Oganezov and B. Olivier and Olsson, {J. E.} and S. Osman and D. Ozerov and V. Palichik and I. Panagoulias and M. Pandurovic and T. Papadopoulou and C. Pascaud and Patel, {G. D.} and H. Peng and E. Perez and D. Perez-Astudillo and A. Perieanu and A. Petrukhin and I. Picuric and S. Piec and D. Pitzl and R. Pla{\v c}akyte and B. Povh and P. Prideaux and Rahmat, {A. J.} and N. Raicevic and P. Reimer and A. Rimmer and C. Risler and E. Rizvi and P. Robmann and B. Roland and R. Roosen and A. Rostovtsev and Z. Rurikova and S. Rusakov and F. Salvaire and Sankey, {D. P.C.} and M. Sauter and E. Sauvan and S. Sch{\"a}tzel and S. Schmidt and S. Schmitt and C. Schmitz and L. Schoeffel and A. Sch{\"o}ning and Schultz-Coulon, {H. C.} and F. Sefkow and Shaw-West, {R. N.} and I. Sheviakov and Shtarkov, {L. N.} and T. Sloan and I. Smiljanic and P. Smirnov and Y. Soloviev and D. South and V. Spaskov and A. Specka and M. Steder and B. Stella and J. Stiewe and A. Stoilov and U. Straumann and D. Sunar and T. Sykora and V. Tchoulakov and G. Thompson and Thompson, {P. D.} and T. Toll and F. Tomasz and D. Traynor and Trinh, {T. N.} and P. Tru{\"o}l and I. Tsakov and G. Tsipolitis and I. Tsurin and J. Turnau and E. Tzamariudaki and K. Urban and A. Usik and D. Utkin and A. Valk{\'a}rov{\'a} and C. Vall{\'e}e and {Van Mechelen}, P. and {Vargas Trevino}, A. and Y. Vazdik and S. Vinokurova and V. Volchinski and K. Wacker and G. Weber and R. Weber and D. Wegener and C. Werner and M. Wessels and C. Wissing and R. Wolf and E. W{\"u}nsch and S. Xella and W. Yan and V. Yeganov and J. {\v Z}{\'a}{\v c}ek and J. Z{\'a}le{\v s}{\'a}k and Z. Zhang and A. Zhelezov and A. Zhokin and Zhu, {Y. C.} and J. Zimmermann and T. Zimmermann and H. Zohrabyan and F. Zomer",

year = "2007",

month = aug,

doi = "10.1140/epjc/s10052-007-0325-4",

language = "English",

volume = "51",

pages = "549--568",

journal = "European Physical Journal C",

issn = "1434-6044",

publisher = "Springer Nature",

number = "3",

}

Aktas, A, Andreev, V, Anthonis, T, Antunovic, B, Aplin, S, Asmone, A, Astvatsatourov, A, Babaev, A, Backovic, S, Baghdasaryan, A, Baranov, P, Barrelet, E, Bartel, W, Baudrand, S, Beckingham, M, Begzsuren, K, Behnke, O, Behrendt, O, Belousov, A, Berger, N, Bizot, JC, Boenig, MO, Boudry, V, Bozovic-Jelisavcic, I, Bracinik, J, Brandt, G, Brinkmann, M, Brisson, V, Bruncko, D, Büsser, FW, Bunyatyan, A, Buschhorn, G, Bystritskaya, L, Campbell, AJ, Cantun Avila, KB, Cassol-Brunner, F, Cerny, K, Cerny, V, Chekelian, V, Cholewa, A, Contreras, JG, Coughlan, JA, Cozzika, G, Cvach, J, Dainton, JB, Daum, K, De Boer, Y, Delcourt, B, Del Degan, M, De Roeck, A, De Wolf, EA, Diaconu, C, Dodonov, V, Dubak, A, Eckerlin, G, Efremenko, V, Egli, S, Eichler, R, Eisele, F, Eliseev, A, Elsen, E, Essenov, S, Falkewicz, A, Faulkner, PJW, Favart, L, Fedotov, A, Felst, R, Feltesse, J, Ferencei, J, Finke, L, Fleischer, M, Flucke, G, Fomenko, A, Franke, G, Frisson, T, Gabathuler, E, Garutti, E, Gayler, J, Ghazaryan, S, Ginzburgskaya, S, Glazov, A, Glushkov, I, Goerlich, L, Goettlich, M, Gogitidze, N, Gorbounov, S, Gouzevitch, M, Grab, C, Greenshaw, T, Gregori, M, Grell, BR, Grindhammer, G, Habib, S, Haidt, D, Hansson, M, Heinzelmann, G, Helebrant, C, Henderson, RCW, Henschel, H, Herrera, G, Hildebrandt, M, Hiller, KH, Hoffmann, D, Horisberger, R, Hovhannisyan, A, Hreus, T, Hussain, S, Jacquet, M, Janssen, X, Jemanov, V, Jönsson, L, Johnson, DP, Jung, AW, Jung, H, Kapichine, M, Katzy, J, Kenyon, IR, Kiesling, C, Klein, M, Kleinwort, C, Klimkovich, T, Kluge, T, Knies, G, Knutsson, A, Korbel, V, Kostka, P, Kraemer, M, Krastev, K, Kretzschmar, J, Kropivnitskaya, A, Krüger, K, Landon, MPJ, Lange, W, Laštovička-Medin, G, Laycock, P, Lebedev, A, Leibenguth, G, Lendermann, V, Levonian, S, Lindfeld, L, Lipka, K, Liptaj, A, List, B, List, J, Loktionova, N, Lopez-Fernandez, R, Lubimov, V, Lucaci-Timoce, AI, Lueders, H, Lytkin, L, Makankine, A, Malinovski, E, Marage, P, Marti, L, Martisikova, M, Martyn, HU, Maxfield, SJ, Mehta, A, Meier, K, Meyer, AB, Meyer, H, Meyer, J, Michels, V, Mikocki, S, Milcewicz-Mika, I, Mladenov, D, Mohamed, A, Moreau, F, Morozov, A, Morris, JV, Mozer, MU, Müller, K, Murín, P, Nankov, K, Naroska, B, Naumann, T, Newman, PR, Niebuhr, C, Nikiforov, A, Nowak, G, Nowak, K, Nozicka, M, Oganezov, R, Olivier, B, Olsson, JE, Osman, S, Ozerov, D, Palichik, V, Panagoulias, I, Pandurovic, M, Papadopoulou, T, Pascaud, C, Patel, GD, Peng, H, Perez, E, Perez-Astudillo, D, Perieanu, A, Petrukhin, A, Picuric, I, Piec, S, Pitzl, D, Plačakyte, R, Povh, B, Prideaux, P, Rahmat, AJ, Raicevic, N, Reimer, P, Rimmer, A, Risler, C, Rizvi, E, Robmann, P, Roland, B, Roosen, R, Rostovtsev, A, Rurikova, Z, Rusakov, S, Salvaire, F, Sankey, DPC, Sauter, M, Sauvan, E, Schätzel, S, Schmidt, S, Schmitt, S, Schmitz, C, Schoeffel, L, Schöning, A, Schultz-Coulon, HC, Sefkow, F, Shaw-West, RN, Sheviakov, I, Shtarkov, LN, Sloan, T, Smiljanic, I, Smirnov, P, Soloviev, Y, South, D, Spaskov, V, Specka, A, Steder, M, Stella, B, Stiewe, J, Stoilov, A, Straumann, U, Sunar, D, Sykora, T, Tchoulakov, V, Thompson, G, Thompson, PD, Toll, T, Tomasz, F, Traynor, D, Trinh, TN, Truöl, P, Tsakov, I, Tsipolitis, G, Tsurin, I, Turnau, J, Tzamariudaki, E, Urban, K, Usik, A, Utkin, D, Valkárová, A, Vallée, C, Van Mechelen, P, Vargas Trevino, A, Vazdik, Y, Vinokurova, S, Volchinski, V, Wacker, K, Weber, G, Weber, R, Wegener, D, Werner, C, Wessels, M, Wissing, C, Wolf, R, Wünsch, E, Xella, S, Yan, W, Yeganov, V, Žáček, J, Zálešák, J, Zhang, Z, Zhelezov, A, Zhokin, A, Zhu, YC, Zimmermann, J, Zimmermann, T, Zohrabyan, H & Zomer, F 2007, 'Tests of QCD factorisation in the diffractive production of dijets in deep-inelastic scattering and photoproduction at HERA', European Physical Journal C, vol. 51, no. 3, pp. 549-568. https://doi.org/10.1140/epjc/s10052-007-0325-4

TY - JOUR

T1 - Tests of QCD factorisation in the diffractive production of dijets in deep-inelastic scattering and photoproduction at HERA

AU - Aktas, A.

AU - Andreev, V.

AU - Anthonis, T.

AU - Antunovic, B.

AU - Aplin, S.

AU - Asmone, A.

AU - Astvatsatourov, A.

AU - Babaev, A.

AU - Backovic, S.

AU - Baghdasaryan, A.

AU - Baranov, P.

AU - Barrelet, E.

AU - Bartel, W.

AU - Baudrand, S.

AU - Beckingham, M.

AU - Begzsuren, K.

AU - Behnke, O.

AU - Behrendt, O.

AU - Belousov, A.

AU - Berger, N.

AU - Bizot, J. C.

AU - Boenig, M. O.

AU - Boudry, V.

AU - Bozovic-Jelisavcic, I.

AU - Bracinik, J.

AU - Brandt, G.

AU - Brinkmann, M.

AU - Brisson, V.

AU - Bruncko, D.

AU - Büsser, F. W.

AU - Bunyatyan, A.

AU - Buschhorn, G.

AU - Bystritskaya, L.

AU - Campbell, A. J.

AU - Cantun Avila, K. B.

AU - Cassol-Brunner, F.

AU - Cerny, K.

AU - Cerny, V.

AU - Chekelian, V.

AU - Cholewa, A.

AU - Contreras, J. G.

AU - Coughlan, J. A.

AU - Cozzika, G.

AU - Cvach, J.

AU - Dainton, J. B.

AU - Daum, K.

AU - De Boer, Y.

AU - Delcourt, B.

AU - Del Degan, M.

AU - De Roeck, A.

AU - De Wolf, E. A.

AU - Diaconu, C.

AU - Dodonov, V.

AU - Dubak, A.

AU - Eckerlin, G.

AU - Efremenko, V.

AU - Egli, S.

AU - Eichler, R.

AU - Eisele, F.

AU - Eliseev, A.

AU - Elsen, E.

AU - Essenov, S.

AU - Falkewicz, A.

AU - Faulkner, P. J.W.

AU - Favart, L.

AU - Fedotov, A.

AU - Felst, R.

AU - Feltesse, J.

AU - Ferencei, J.

AU - Finke, L.

AU - Fleischer, M.

AU - Flucke, G.

AU - Fomenko, A.

AU - Franke, G.

AU - Frisson, T.

AU - Gabathuler, E.

AU - Garutti, E.

AU - Gayler, J.

AU - Ghazaryan, S.

AU - Ginzburgskaya, S.

AU - Glazov, A.

AU - Glushkov, I.

AU - Goerlich, L.

AU - Goettlich, M.

AU - Gogitidze, N.

AU - Gorbounov, S.

AU - Gouzevitch, M.

AU - Grab, C.

AU - Greenshaw, T.

AU - Gregori, M.

AU - Grell, B. R.

AU - Grindhammer, G.

AU - Habib, S.

AU - Haidt, D.

AU - Hansson, M.

AU - Heinzelmann, G.

AU - Helebrant, C.

AU - Henderson, R. C.W.

AU - Henschel, H.

AU - Herrera, G.

AU - Hildebrandt, M.

AU - Hiller, K. H.

AU - Hoffmann, D.

AU - Horisberger, R.

AU - Hovhannisyan, A.

AU - Hreus, T.

AU - Hussain, S.

AU - Jacquet, M.

AU - Janssen, X.

AU - Jemanov, V.

AU - Jönsson, L.

AU - Johnson, D. P.

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 - Klimkovich, T.

AU - Kluge, T.

AU - Knies, G.

AU - Knutsson, A.

AU - Korbel, V.

AU - Kostka, P.

AU - Kraemer, M.

AU - Krastev, K.

AU - Kretzschmar, J.

AU - Kropivnitskaya, A.

AU - Krüger, K.

AU - Landon, M. P.J.

AU - Lange, W.

AU - Laštovička-Medin, G.

AU - Laycock, P.

AU - Lebedev, A.

AU - Leibenguth, G.

AU - Lendermann, V.

AU - Levonian, S.

AU - Lindfeld, L.

AU - Lipka, K.

AU - Liptaj, A.

AU - List, B.

AU - List, J.

AU - Loktionova, N.

AU - Lopez-Fernandez, R.

AU - Lubimov, V.

AU - Lucaci-Timoce, A. I.

AU - Lueders, H.

AU - Lytkin, L.

AU - Makankine, A.

AU - Malinovski, E.

AU - Marage, P.

AU - Marti, L.

AU - Martisikova, M.

AU - Martyn, H. U.

AU - Maxfield, S. J.

AU - Mehta, A.

AU - Meier, K.

AU - Meyer, A. B.

AU - Meyer, H.

AU - Meyer, J.

AU - Michels, V.

AU - Mikocki, S.

AU - Milcewicz-Mika, I.

AU - Mladenov, D.

AU - Mohamed, A.

AU - Moreau, F.

AU - Morozov, A.

AU - Morris, J. V.

AU - Mozer, M. U.

AU - Müller, K.

AU - Murín, P.

AU - Nankov, K.

AU - Naroska, B.

AU - Naumann, T.

AU - Newman, P. R.

AU - Niebuhr, C.

AU - Nikiforov, A.

AU - Nowak, G.

AU - Nowak, K.

AU - Nozicka, M.

AU - Oganezov, R.

AU - Olivier, B.

AU - Olsson, J. E.

AU - Osman, S.

AU - Ozerov, D.

AU - Palichik, V.

AU - Panagoulias, I.

AU - Pandurovic, M.

AU - Papadopoulou, T.

AU - Pascaud, C.

AU - Patel, G. D.

AU - Peng, H.

AU - Perez, E.

AU - Perez-Astudillo, D.

AU - Perieanu, A.

AU - Petrukhin, A.

AU - Picuric, I.

AU - Piec, S.

AU - Pitzl, D.

AU - Plačakyte, R.

AU - Povh, B.

AU - Prideaux, P.

AU - Rahmat, A. J.

AU - Raicevic, N.

AU - Reimer, P.

AU - Rimmer, A.

AU - Risler, C.

AU - Rizvi, E.

AU - Robmann, P.

AU - Roland, B.

AU - Roosen, R.

AU - Rostovtsev, A.

AU - Rurikova, Z.

AU - Rusakov, S.

AU - Salvaire, F.

AU - Sankey, D. P.C.

AU - Sauter, M.

AU - Sauvan, E.

AU - Schätzel, S.

AU - Schmidt, S.

AU - Schmitt, S.

AU - Schmitz, C.

AU - Schoeffel, L.

AU - Schöning, A.

AU - Schultz-Coulon, H. C.

AU - Sefkow, F.

AU - Shaw-West, R. N.

AU - Sheviakov, I.

AU - Shtarkov, L. N.

AU - Sloan, T.

AU - Smiljanic, I.

AU - Smirnov, P.

AU - Soloviev, Y.

AU - South, D.

AU - Spaskov, V.

AU - Specka, A.

AU - Steder, M.

AU - Stella, B.

AU - Stiewe, J.

AU - Stoilov, A.

AU - Straumann, U.

AU - Sunar, D.

AU - Sykora, T.

AU - Tchoulakov, V.

AU - Thompson, G.

AU - Thompson, P. D.

AU - Toll, T.

AU - Tomasz, F.

AU - Traynor, D.

AU - Trinh, T. N.

AU - Truöl, P.

AU - Tsakov, I.

AU - Tsipolitis, G.

AU - Tsurin, I.

AU - Turnau, J.

AU - Tzamariudaki, E.

AU - Urban, K.

AU - Usik, A.

AU - Utkin, D.

AU - Valkárová, A.

AU - Vallée, C.

AU - Van Mechelen, P.

AU - Vargas Trevino, A.

AU - Vazdik, Y.

AU - Vinokurova, S.

AU - Volchinski, V.

AU - Wacker, K.

AU - Weber, G.

AU - Weber, R.

AU - Wegener, D.

AU - Werner, C.

AU - Wessels, M.

AU - Wissing, C.

AU - Wolf, R.

AU - Wünsch, E.

AU - Xella, S.

AU - Yan, W.

AU - Yeganov, V.

AU - Žáček, J.

AU - Zálešák, J.

AU - Zhang, Z.

AU - Zhelezov, A.

AU - Zhokin, A.

AU - Zhu, Y. C.

AU - Zimmermann, J.

AU - Zimmermann, T.

AU - Zohrabyan, H.

AU - Zomer, F.

PY - 2007/8

Y1 - 2007/8

N2 - Measurements are presented of differential dijet cross sections in diffractive photoproduction (Q2<0.01 GeV2) and deep-inelastic scattering processes (DIS, 42<80 GeV 2). The event topology is given by ep→eXY, in which the system X, containing at least two jets, is separated from a leading low-mass baryonic system Y by a large rapidity gap. The dijet cross sections are compared with NLO QCD predictions based on diffractive parton densities previously obtained from a QCD analysis of inclusive diffractive DIS cross sections by H1. In DIS, the dijet data are well described, supporting the validity of QCD factorisation. The diffractive DIS dijet data are more sensitive to the diffractive gluon density at high fractional parton momentum than the measurements of inclusive diffractive DIS. In photoproduction, the predicted dijet cross section has to be multiplied by a factor of approximately 0.5 for both direct and resolved photon interactions to describe the measurements. The ratio of measured dijet cross section to NLO prediction in photoproduction is a factor 0.5±0.1 smaller than the same ratio in DIS. This suppression is the first clear observation of QCD hard scattering factorisation breaking at HERA. The measurements are also compared to the two soft colour neutralisation models SCI and GAL. The SCI model describes diffractive dijet production in DIS but not in photoproduction. The GAL model fails in both kinematic regions.

AB - Measurements are presented of differential dijet cross sections in diffractive photoproduction (Q2<0.01 GeV2) and deep-inelastic scattering processes (DIS, 42<80 GeV 2). The event topology is given by ep→eXY, in which the system X, containing at least two jets, is separated from a leading low-mass baryonic system Y by a large rapidity gap. The dijet cross sections are compared with NLO QCD predictions based on diffractive parton densities previously obtained from a QCD analysis of inclusive diffractive DIS cross sections by H1. In DIS, the dijet data are well described, supporting the validity of QCD factorisation. The diffractive DIS dijet data are more sensitive to the diffractive gluon density at high fractional parton momentum than the measurements of inclusive diffractive DIS. In photoproduction, the predicted dijet cross section has to be multiplied by a factor of approximately 0.5 for both direct and resolved photon interactions to describe the measurements. The ratio of measured dijet cross section to NLO prediction in photoproduction is a factor 0.5±0.1 smaller than the same ratio in DIS. This suppression is the first clear observation of QCD hard scattering factorisation breaking at HERA. The measurements are also compared to the two soft colour neutralisation models SCI and GAL. The SCI model describes diffractive dijet production in DIS but not in photoproduction. The GAL model fails in both kinematic regions.

UR - http://www.scopus.com/inward/record.url?scp=85055485522&partnerID=8YFLogxK

U2 - 10.1140/epjc/s10052-007-0325-4

DO - 10.1140/epjc/s10052-007-0325-4

M3 - Article

AN - SCOPUS:85055485522

SN - 1434-6044

VL - 51

SP - 549

EP - 568

JO - European Physical Journal C

JF - European Physical Journal C

IS - 3

ER -

Tests of QCD factorisation in the diffractive production of dijets in deep-inelastic scattering and photoproduction at HERA

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