1. High-mass dijet cross sections in photoproduction at HERA
- Author
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Chekanov, S, Derrick, M, Krakauer, D, Magill, S, Musgrave, B, Pellegrino, A, Repond, J, Yoshida, R, Mattingly, M C K, Antonioli, P, Bari, G, Basile, M, Bellagamba, L, Boscherini, D, Bruni, A, Bruni, G, Romeo, G C, Cifarelli, L, Cindolo, F, Contin, A, Corradi, M, De Pasquale, S, Giusti, P, Iacobucci, G, Levi, G, Margotti, A, Massam, T, Nania, R, Palmonari, F, Pesci, A, Sartorelli, G, Zichichi, A, Aghuzumtsyan, G, Bartsch, D, Brock, I, Crittenden, J, Goers, S, Hartmann, H, Hilger, E, Irrgang, P, Jakob, H P, Kappes, A, Katz, U F, Kerger, R, Kind, O, Paul, E, Rautenberg, J, Renner, R, Schnurbusch, H, Stifutkin, A, Tandler, J, Voss, K C, Weber, A, Wessoleck, H, Bailey, D S, Brook, N H, Cole, J E, Foster, B, Heath, G P, Heath, H F, Robins, S, Rodrigues, E, Scott, J, Tapper, R J, Wing, M, Capua, M, Mastroberardino, A, Schioppa, M, Susinno, G, Jeoung, H Y, Kim, J Y, Lee, J H, Lim, I T, Ma, K J, Pac, M Y, Caldwell, A, Helbich, M, Liu, X, Mellado, B, Paganis, S, Schmidke, W B, Sciulli, F, Chwastowski, J, Eskreys, A, Figiel, J, Olkiewicz, K, Przybycien, M B, Stopa, P, Zawiejski, L, Bednarek, B, Grabowska-Bold, I, Jelen, K, Kisielewska, D, Kowal, A M, Kowal, M, Kowalski, T, Mindur, B, Przybycien, M, Rulikowska-Zarebska, E, Suszycki, L, Szuba, D, Szuba, J, Kotanski, A, Slominski, W, Bauerdick, L A T, Behrens, U, Borras, K, Chiochia, V, Dannheim, D, Desler, K, Drews, G, Fourletova, J, Fox-Murphy, A, Fricke, U, Geiser, A, Goebel, F, Gottlicher, P, Graciani, R, Haas, T, Hain, W, Hartner, G F, Hillert, S, Kotz, U, Kowalski, H, Labes, H, Lelas, D, Lohr, B, Mankel, R, Martens, J, Martinez, M, Moritz, M, Notz, D, Petrucci, M C, Polini, A, Schneekloth, U, Selonke, F, Stonjek, S, Surrow, B, Whitmore, J J, Wichmann, R, Wolf, G, Youngman, C, Zeuner, W, Coldewey, C, Viani, A L D, Meyer, A, Schlenstedt, S, Barbagli, G, Gallo, E, Genta, C, Pelfer, P G, Bamberger, A, Benen, A, Coppola, N, Markun, P, Raach, H, Wolfle, S, Bell, M, Bussey, P J, Doyle, A T, Glasman, C, Hanlon, S, Lee, S W, Lupi, A, McCance, G J, Saxon, D H, Skillicorn, I O, Bodmann, B, Holm, U, Salehi, H, Wick, K, Ziegler, A, Carli, T, Gialas, I, Klimek, K, Lohrmann, E, Milite, M, Collins-Tooth, C, Foudas, C, Goncalo, R, Long, K R, Metlica, F, Miller, D B, Tapper, A D, Walker, R, Cloth, P, Filges, D, Kuze, M, Nagano, K, Tokushuku, K, Yamada, S, Yamazaki, Y, Barakbaev, A N, Boos, E G, Pokrovskiy, N S, Zhautykov, B O, Ahn, S H, Lee, S B, Park, S K, Lim, H, Son, D, Barreiro, F, Garcia, G, Gonzalez, O, Labarga, L, del Peso, J, Redondo, I, Terron, J, Vazquez, M, Barbi, M, Bertolin, A, Corriveau, F, Ochs, A, Padhi, S, Stairs, D G, St-Laurent, M, Tsurugai, T, Antonov, A, Bashkirov, V, Danilov, P, Dolgoshein, B A, Gladkov, D, Sosnovtsev, V, Suchkov, S, Dementiev, R K, Ermolov, P F, Golubkov, Y A, Katkov, I I, Khein, L A, Korotkova, N A, Korzhavina, I A, Kuzmin, V A, Levchenko, B B, Lukina, O Y, Proskuryakov, A S, Shcheglova, L M, Solomin, A N, Vlasov, N N, Zotkin, S A, Bokel, C, Engelen, J, Grijpink, S, Koffeman, E, Kooijman, P, Maddox, E, Schagen, S, Tassi, E, Tiecke, H, Tuning, N, Velthuis, J J, Wiggers, L, de Wolf, E, Brummer, N, Bylsma, B, Durkin, L S, Gilmore, J, Ginsburg, C M, Kim, C L, Ling, T Y, Boogert, S, Cooper-Sarkar, A M, Devenish, R C E, Ferrando, J, Matsushita, T, Rigby, M, Ruske, O, Sutton, M R, Walczak, R, Brugnera, R, Carlin, R, Dal Corso, F, Dusini, S, Garfagnini, A, Limentani, S, Longhin, A, Parenti, A, Posocco, M, Stanco, L, Turcato, M, Adamczyk, L, Oh, B Y, Saull, P R B, Iga, Y, D'Agostini, G, Marini, G, Nigro, A, Cormack, C, Hart, J C, McCubbin, N A, Heusch, C, Park, I H, Pavel, N, Abramowicz, H, Dagan, S, Gabareen, A, Kananov, S, Kreisel, A, Levy, A, Abe, T, Fusayasu, T, Kohno, T, Umemori, K, Yamashita, T, Hamatsu, R, Hirose, T, Inuzuka, M, Kitamura, S, Matsuzawa, K, Nishimura, T, Arneodo, M, Cartiglia, N, Cirio, R, Costa, M, Ferrero, M I, Maselli, S, Monaco, V, Peroni, C, Ruspa, M, Sacchi, R, Solano, A, Staiano, A, Galea, R, Koop, T, Levman, G M, Martin, J F, Mirea, A, Sabetfakhri, A, Butterworth, J M, Gwenlan, C, Hall-Wilton, R, Hayes, M E, Heaphy, E A, Jones, T W, Lane, J B, Lightwood, M S, West, B J, Ciborowski, J, Ciesielski, R, Grzelak, G, Nowak, R J, Pawlak, J M, Smalska, B, Sztuk, J, Tymieniecka, T, Ukleja, A, Ukleja, J, Zakrzewski, J A, Zarnecki, A F, Adamus, M, Plucinski, P, Eisenberg, Y, Gladilin, L K, Hochman, D, Karshon, U, Breitweg, J, Chapin, D, Cross, R, Kcira, D, Lammers, S, Reeder, D D, Savin, A A, Smith, W H, Deshpande, A, Dhawan, S, Hughes, V, Straub, P B, Bhadra, S, Catterall, C D, Fourletov, S, Menary, S, Soares, M, Standage, J, ZEUS Collaboration, Chekanov, S, Derrick, M, Krakauer, D, Magill, S, Musgrave, B, Pellegrino, A, Repond, J, Yoshida, R, Mattingly, M C K, Antonioli, P, Bari, G, Basile, M, Bellagamba, L, Boscherini, D, Bruni, A, Bruni, G, Romeo, G C, Cifarelli, L, Cindolo, F, Contin, A, Corradi, M, De Pasquale, S, Giusti, P, Iacobucci, G, Levi, G, Margotti, A, Massam, T, Nania, R, Palmonari, F, Pesci, A, Sartorelli, G, Zichichi, A, Aghuzumtsyan, G, Bartsch, D, Brock, I, Crittenden, J, Goers, S, Hartmann, H, Hilger, E, Irrgang, P, Jakob, H P, Kappes, A, Katz, U F, Kerger, R, Kind, O, Paul, E, Rautenberg, J, Renner, R, Schnurbusch, H, Stifutkin, A, Tandler, J, Voss, K C, Weber, A, Wessoleck, H, Bailey, D S, Brook, N H, Cole, J E, Foster, B, Heath, G P, Heath, H F, Robins, S, Rodrigues, E, Scott, J, Tapper, R J, Wing, M, Capua, M, Mastroberardino, A, Schioppa, M, Susinno, G, Jeoung, H Y, Kim, J Y, Lee, J H, Lim, I T, Ma, K J, Pac, M Y, Caldwell, A, Helbich, M, Liu, X, Mellado, B, Paganis, S, Schmidke, W B, Sciulli, F, Chwastowski, J, Eskreys, A, Figiel, J, Olkiewicz, K, Przybycien, M B, Stopa, P, Zawiejski, L, Bednarek, B, Grabowska-Bold, I, Jelen, K, Kisielewska, D, Kowal, A M, Kowal, M, Kowalski, T, Mindur, B, Przybycien, M, Rulikowska-Zarebska, E, Suszycki, L, Szuba, D, Szuba, J, Kotanski, A, Slominski, W, Bauerdick, L A T, Behrens, U, Borras, K, Chiochia, V, Dannheim, D, Desler, K, Drews, G, Fourletova, J, Fox-Murphy, A, Fricke, U, Geiser, A, Goebel, F, Gottlicher, P, Graciani, R, Haas, T, Hain, W, Hartner, G F, Hillert, S, Kotz, U, Kowalski, H, Labes, H, Lelas, D, Lohr, B, Mankel, R, Martens, J, Martinez, M, Moritz, M, Notz, D, Petrucci, M C, Polini, A, Schneekloth, U, Selonke, F, Stonjek, S, Surrow, B, Whitmore, J J, Wichmann, R, Wolf, G, Youngman, C, Zeuner, W, Coldewey, C, Viani, A L D, Meyer, A, Schlenstedt, S, Barbagli, G, Gallo, E, Genta, C, Pelfer, P G, Bamberger, A, Benen, A, Coppola, N, Markun, P, Raach, H, Wolfle, S, Bell, M, Bussey, P J, Doyle, A T, Glasman, C, Hanlon, S, Lee, S W, Lupi, A, McCance, G J, Saxon, D H, Skillicorn, I O, Bodmann, B, Holm, U, Salehi, H, Wick, K, Ziegler, A, Carli, T, Gialas, I, Klimek, K, Lohrmann, E, Milite, M, Collins-Tooth, C, Foudas, C, Goncalo, R, Long, K R, Metlica, F, Miller, D B, Tapper, A D, Walker, R, Cloth, P, Filges, D, Kuze, M, Nagano, K, Tokushuku, K, Yamada, S, Yamazaki, Y, Barakbaev, A N, Boos, E G, Pokrovskiy, N S, Zhautykov, B O, Ahn, S H, Lee, S B, Park, S K, Lim, H, Son, D, Barreiro, F, Garcia, G, Gonzalez, O, Labarga, L, del Peso, J, Redondo, I, Terron, J, Vazquez, M, Barbi, M, Bertolin, A, Corriveau, F, Ochs, A, Padhi, S, Stairs, D G, St-Laurent, M, Tsurugai, T, Antonov, A, Bashkirov, V, Danilov, P, Dolgoshein, B A, Gladkov, D, Sosnovtsev, V, Suchkov, S, Dementiev, R K, Ermolov, P F, Golubkov, Y A, Katkov, I I, Khein, L A, Korotkova, N A, Korzhavina, I A, Kuzmin, V A, Levchenko, B B, Lukina, O Y, Proskuryakov, A S, Shcheglova, L M, Solomin, A N, Vlasov, N N, Zotkin, S A, Bokel, C, Engelen, J, Grijpink, S, Koffeman, E, Kooijman, P, Maddox, E, Schagen, S, Tassi, E, Tiecke, H, Tuning, N, Velthuis, J J, Wiggers, L, de Wolf, E, Brummer, N, Bylsma, B, Durkin, L S, Gilmore, J, Ginsburg, C M, Kim, C L, Ling, T Y, Boogert, S, Cooper-Sarkar, A M, Devenish, R C E, Ferrando, J, Matsushita, T, Rigby, M, Ruske, O, Sutton, M R, Walczak, R, Brugnera, R, Carlin, R, Dal Corso, F, Dusini, S, Garfagnini, A, Limentani, S, Longhin, A, Parenti, A, Posocco, M, Stanco, L, Turcato, M, Adamczyk, L, Oh, B Y, Saull, P R B, Iga, Y, D'Agostini, G, Marini, G, Nigro, A, Cormack, C, Hart, J C, McCubbin, N A, Heusch, C, Park, I H, Pavel, N, Abramowicz, H, Dagan, S, Gabareen, A, Kananov, S, Kreisel, A, Levy, A, Abe, T, Fusayasu, T, Kohno, T, Umemori, K, Yamashita, T, Hamatsu, R, Hirose, T, Inuzuka, M, Kitamura, S, Matsuzawa, K, Nishimura, T, Arneodo, M, Cartiglia, N, Cirio, R, Costa, M, Ferrero, M I, Maselli, S, Monaco, V, Peroni, C, Ruspa, M, Sacchi, R, Solano, A, Staiano, A, Galea, R, Koop, T, Levman, G M, Martin, J F, Mirea, A, Sabetfakhri, A, Butterworth, J M, Gwenlan, C, Hall-Wilton, R, Hayes, M E, Heaphy, E A, Jones, T W, Lane, J B, Lightwood, M S, West, B J, Ciborowski, J, Ciesielski, R, Grzelak, G, Nowak, R J, Pawlak, J M, Smalska, B, Sztuk, J, Tymieniecka, T, Ukleja, A, Ukleja, J, Zakrzewski, J A, Zarnecki, A F, Adamus, M, Plucinski, P, Eisenberg, Y, Gladilin, L K, Hochman, D, Karshon, U, Breitweg, J, Chapin, D, Cross, R, Kcira, D, Lammers, S, Reeder, D D, Savin, A A, Smith, W H, Deshpande, A, Dhawan, S, Hughes, V, Straub, P B, Bhadra, S, Catterall, C D, Fourletov, S, Menary, S, Soares, M, Standage, J, and ZEUS Collaboration
- Abstract
Dijet differential cross sections for the reaction e(-)p --> e(+) jet + jet + X in the photoproduction regime have been measured with the ZEUS detector at HERA using an integrated luminosity of 42.7 pb(-1), The cross sections are given for photon-proton centre-of-mass energies in the range 134 < W < 277 GeV The differential cross sections as a function of the dijet mass, M-jj, and of the dijet angular variables have been measured for 47 < M-jj < 160 GeV and compared to next-to-leading-order QCD calculations. The dijet events in the region 75 < M-jj < 100 GeV have been used to derive a 95% C.L. upper limit on the cross section for Z(0) photoproduction of sigma(e+ p --> e+ Z0X) < 5.9 pb. Upper limits on the photoproduction of new heavy resonances decaying into two jets are also presented for masses in the range between 60 GeV and 155 GeV (C) 2002 Elsevier Science B.V. All rights reserved.