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Photoproduction of J/{psi}mesons at HERA

Technical Report:

Abstract

We present a study of J/{psi} meson production in collisions of 26.7 GeV electrons with 820 GeV protons, performed with the H1-detector at the HERA collider at DESY. The J/{psi} mesons are detected via their leptonic decays both to electrons and muons. Requiring exactly two particles in the detector, a cross section of {sigma}(ep{yields}J/{psi}X)=(8.8{+-}2.0{+-}2.2) nb is determined for 30 GeV{<=}W{sub {gamma}p}{<=}180 GeV and Q{sup 2}< or {approx}4 GeV{sup 2}. Using the flux of quasi-real photons with Q{sup 2}< or {approx}4 GeV{sup 2}, a total photoproduction cross section of {sigma}({gamma}p{yields}J/{psi}X)=(56{+-}13{+-}14) nb is derived at an average W{sub {gamma}p}=90 GeV. The distribution of the squared momentum transfer t from the proton to the J/{psi} can be fitted using an exponential exp(-bvertical stroke tvertical stroke ) below avertical stroke tvertical stroke of 0.75 GeV{sup 2} yielding a slope parameter of b=(4.7{+-}1.9) GeV{sup -2}. (orig.)
Authors:
Ahmed, T; Aid, S; Andreev, V; Andrieu, B; Appuhn, R D; Arpagaus, M; Babaev, A; Baehr, J; Ban, J; Baranov, P; Barrelet, E; Bartel, W; Barth, M; Bassler, U; Beck, H P; Behrend, H J; Belousov, A; Berger, C; Bergstein, H; Bernardi, G; Bernet, R; Bertrand-Coremans, G; Besancon, M; Beyer, R; Biddulph, P; Bizot, J C; Blobel, V; Borras, K; Botterweck, F; Boudry, V; Braemer, A; Brasse, F; Braunschweig, W; Brisson, V; Bruncko, D; Brune, C; Buchholz, R; Buengener, L; Buerger, J; Buesser, F W; Buniatian, A; Burke, S; Buschhorn, G; Campbell, A J; Carli, T; Charles, F; Clarke, D; Clegg, A B; Colombo, M; Contreras, J G; Coughlan, J A; Courau, A; Coutures, C; Cozzika, G; Criegee, L; Cussans, D G; Cvach, J; Dagoret, S; Dainton, J B; Danilov, M; Dau, W D; Daum, K; David, M; Deffur, E; Delcourt, B; Del Buono, L; De Roeck, A; De Wolf, E A; Di Nezza, P; Dollfus, C; Dowell, J D; Dreis, H B; Duboc, J; Duellmann, D; Duenger, O; Duhm, H; Ebert, J; Ebert, T R; Eckerlin, G; Efremenko, V; Egli, S; Ehrlichmann, H; Eichenberger, S; Eichler, R; Eisele, F; Eisenhandler, E; Ellison, R J; Elsen, E; Erdmann, M; Erdmann, W; Evrard, E; Favart, L; Fedotov, A; Feeken, D; Felst, R; Feltesse, J; Ferencei, J; Ferrarotto, F; Flamm, K; Fleischer, M; Flieser, M; Fluegge, G; Fomenko, A; Fominykh, B; Forbush, M; Formanek, J; Foster, J M; Franke, G; Fretwurst, E; Gabathuler, E; Gabathuler, K; Gamerdinger, K; Garvey, J; Gayler, J; Gebauer, M; Gellrich, A; Genzel, H; Gerhards, R; Goerlach, U; Goerlich, L; Gogitidze, N; Goldberg, M; Goldner, D; Gonzalez-Pineiro, B; Goodall, A M; Gorelov, I; Goritchev, P; Grab, C; Graessler, H; Graessler, R; Greenshaw, T; Grindhammer, G; Gruber, A; Gruber, C; Haack, J; Haidt, D; Hajduk, L; Hamon, O; Hampel, M; Hanlon, E M; Hapke, M; Haynes, W J; Heatherington, J; Hedberg, V; Heinzelmann, G; Henderson, R C.W.; Henschel, H; H1 Collaboration
Publication Date:
Aug 01, 1994
Product Type:
Technical Report
Report Number:
DESY-94-153
Reference Number:
SCA: 662330; PA: DEN-94:0FO474; EDB-95:025801; SN: 95001313535
Resource Relation:
Other Information: PBD: Aug 1994
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; ELECTRON-PROTON INTERACTIONS; INCLUSIVE INTERACTIONS; PHOTOPRODUCTION; J PSI-3097 MESONS; EXPERIMENTAL DATA; DIFFERENTIAL CROSS SECTIONS; EFFECTIVE MASS; GEV RANGE 10-100; GEV RANGE 100-1000; INTEGRAL CROSS SECTIONS; LEPTONIC DECAY; MASS SPECTRA; TRANSVERSE MOMENTUM; ELECTROPRODUCTION; PAIR PRODUCTION; MUON PAIRS; MUONS PLUS; MUONS MINUS; ELECTRONS; POSITRONS; PHOTON-PROTON INTERACTIONS; 662330; PHOTON AND CHARGED-LEPTON INTERACTIONS WITH HADRONS
OSTI ID:
10108162
Research Organizations:
Deutsches Elektronen-Synchrotron (DESY), Hamburg (Germany)
Country of Origin:
Germany
Language:
English
Other Identifying Numbers:
Journal ID: ISSN 0418-9833; Other: ON: DE95731948; TRN: DE94FO474
Availability:
OSTI; NTIS (US Sales Only); INIS
Submitting Site:
DEN
Size:
16 p.
Announcement Date:
Jun 30, 2005

Technical Report:

Citation Formats

Ahmed, T, Aid, S, Andreev, V, Andrieu, B, Appuhn, R D, Arpagaus, M, Babaev, A, Baehr, J, Ban, J, Baranov, P, Barrelet, E, Bartel, W, Barth, M, Bassler, U, Beck, H P, Behrend, H J, Belousov, A, Berger, C, Bergstein, H, Bernardi, G, Bernet, R, Bertrand-Coremans, G, Besancon, M, Beyer, R, Biddulph, P, Bizot, J C, Blobel, V, Borras, K, Botterweck, F, Boudry, V, Braemer, A, Brasse, F, Braunschweig, W, Brisson, V, Bruncko, D, Brune, C, Buchholz, R, Buengener, L, Buerger, J, Buesser, F W, Buniatian, A, Burke, S, Buschhorn, G, Campbell, A J, Carli, T, Charles, F, Clarke, D, Clegg, A B, Colombo, M, Contreras, J G, Coughlan, J A, Courau, A, Coutures, C, Cozzika, G, Criegee, L, Cussans, D G, Cvach, J, Dagoret, S, Dainton, J B, Danilov, M, Dau, W D, Daum, K, David, M, Deffur, E, Delcourt, B, Del Buono, L, De Roeck, A, De Wolf, E A, Di Nezza, P, Dollfus, C, Dowell, J D, Dreis, H B, Duboc, J, Duellmann, D, Duenger, O, Duhm, H, Ebert, J, Ebert, T R, Eckerlin, G, Efremenko, V, Egli, S, Ehrlichmann, H, Eichenberger, S, Eichler, R, Eisele, F, Eisenhandler, E, Ellison, R J, Elsen, E, Erdmann, M, Erdmann, W, Evrard, E, Favart, L, Fedotov, A, Feeken, D, Felst, R, Feltesse, J, Ferencei, J, Ferrarotto, F, Flamm, K, Fleischer, M, Flieser, M, Fluegge, G, Fomenko, A, Fominykh, B, Forbush, M, Formanek, J, Foster, J M, Franke, G, Fretwurst, E, Gabathuler, E, Gabathuler, K, Gamerdinger, K, Garvey, J, Gayler, J, Gebauer, M, Gellrich, A, Genzel, H, Gerhards, R, Goerlach, U, Goerlich, L, Gogitidze, N, Goldberg, M, Goldner, D, Gonzalez-Pineiro, B, Goodall, A M, Gorelov, I, Goritchev, P, Grab, C, Graessler, H, Graessler, R, Greenshaw, T, Grindhammer, G, Gruber, A, Gruber, C, Haack, J, Haidt, D, Hajduk, L, Hamon, O, Hampel, M, Hanlon, E M, Hapke, M, Haynes, W J, Heatherington, J, Hedberg, V, Heinzelmann, G, Henderson, R C.W., Henschel, H, and H1 Collaboration. Photoproduction of J/{psi}mesons at HERA. Germany: N. p., 1994. Web.
Ahmed, T, Aid, S, Andreev, V, Andrieu, B, Appuhn, R D, Arpagaus, M, Babaev, A, Baehr, J, Ban, J, Baranov, P, Barrelet, E, Bartel, W, Barth, M, Bassler, U, Beck, H P, Behrend, H J, Belousov, A, Berger, C, Bergstein, H, Bernardi, G, Bernet, R, Bertrand-Coremans, G, Besancon, M, Beyer, R, Biddulph, P, Bizot, J C, Blobel, V, Borras, K, Botterweck, F, Boudry, V, Braemer, A, Brasse, F, Braunschweig, W, Brisson, V, Bruncko, D, Brune, C, Buchholz, R, Buengener, L, Buerger, J, Buesser, F W, Buniatian, A, Burke, S, Buschhorn, G, Campbell, A J, Carli, T, Charles, F, Clarke, D, Clegg, A B, Colombo, M, Contreras, J G, Coughlan, J A, Courau, A, Coutures, C, Cozzika, G, Criegee, L, Cussans, D G, Cvach, J, Dagoret, S, Dainton, J B, Danilov, M, Dau, W D, Daum, K, David, M, Deffur, E, Delcourt, B, Del Buono, L, De Roeck, A, De Wolf, E A, Di Nezza, P, Dollfus, C, Dowell, J D, Dreis, H B, Duboc, J, Duellmann, D, Duenger, O, Duhm, H, Ebert, J, Ebert, T R, Eckerlin, G, Efremenko, V, Egli, S, Ehrlichmann, H, Eichenberger, S, Eichler, R, Eisele, F, Eisenhandler, E, Ellison, R J, Elsen, E, Erdmann, M, Erdmann, W, Evrard, E, Favart, L, Fedotov, A, Feeken, D, Felst, R, Feltesse, J, Ferencei, J, Ferrarotto, F, Flamm, K, Fleischer, M, Flieser, M, Fluegge, G, Fomenko, A, Fominykh, B, Forbush, M, Formanek, J, Foster, J M, Franke, G, Fretwurst, E, Gabathuler, E, Gabathuler, K, Gamerdinger, K, Garvey, J, Gayler, J, Gebauer, M, Gellrich, A, Genzel, H, Gerhards, R, Goerlach, U, Goerlich, L, Gogitidze, N, Goldberg, M, Goldner, D, Gonzalez-Pineiro, B, Goodall, A M, Gorelov, I, Goritchev, P, Grab, C, Graessler, H, Graessler, R, Greenshaw, T, Grindhammer, G, Gruber, A, Gruber, C, Haack, J, Haidt, D, Hajduk, L, Hamon, O, Hampel, M, Hanlon, E M, Hapke, M, Haynes, W J, Heatherington, J, Hedberg, V, Heinzelmann, G, Henderson, R C.W., Henschel, H, & H1 Collaboration. Photoproduction of J/{psi}mesons at HERA. Germany.
Ahmed, T, Aid, S, Andreev, V, Andrieu, B, Appuhn, R D, Arpagaus, M, Babaev, A, Baehr, J, Ban, J, Baranov, P, Barrelet, E, Bartel, W, Barth, M, Bassler, U, Beck, H P, Behrend, H J, Belousov, A, Berger, C, Bergstein, H, Bernardi, G, Bernet, R, Bertrand-Coremans, G, Besancon, M, Beyer, R, Biddulph, P, Bizot, J C, Blobel, V, Borras, K, Botterweck, F, Boudry, V, Braemer, A, Brasse, F, Braunschweig, W, Brisson, V, Bruncko, D, Brune, C, Buchholz, R, Buengener, L, Buerger, J, Buesser, F W, Buniatian, A, Burke, S, Buschhorn, G, Campbell, A J, Carli, T, Charles, F, Clarke, D, Clegg, A B, Colombo, M, Contreras, J G, Coughlan, J A, Courau, A, Coutures, C, Cozzika, G, Criegee, L, Cussans, D G, Cvach, J, Dagoret, S, Dainton, J B, Danilov, M, Dau, W D, Daum, K, David, M, Deffur, E, Delcourt, B, Del Buono, L, De Roeck, A, De Wolf, E A, Di Nezza, P, Dollfus, C, Dowell, J D, Dreis, H B, Duboc, J, Duellmann, D, Duenger, O, Duhm, H, Ebert, J, Ebert, T R, Eckerlin, G, Efremenko, V, Egli, S, Ehrlichmann, H, Eichenberger, S, Eichler, R, Eisele, F, Eisenhandler, E, Ellison, R J, Elsen, E, Erdmann, M, Erdmann, W, Evrard, E, Favart, L, Fedotov, A, Feeken, D, Felst, R, Feltesse, J, Ferencei, J, Ferrarotto, F, Flamm, K, Fleischer, M, Flieser, M, Fluegge, G, Fomenko, A, Fominykh, B, Forbush, M, Formanek, J, Foster, J M, Franke, G, Fretwurst, E, Gabathuler, E, Gabathuler, K, Gamerdinger, K, Garvey, J, Gayler, J, Gebauer, M, Gellrich, A, Genzel, H, Gerhards, R, Goerlach, U, Goerlich, L, Gogitidze, N, Goldberg, M, Goldner, D, Gonzalez-Pineiro, B, Goodall, A M, Gorelov, I, Goritchev, P, Grab, C, Graessler, H, Graessler, R, Greenshaw, T, Grindhammer, G, Gruber, A, Gruber, C, Haack, J, Haidt, D, Hajduk, L, Hamon, O, Hampel, M, Hanlon, E M, Hapke, M, Haynes, W J, Heatherington, J, Hedberg, V, Heinzelmann, G, Henderson, R C.W., Henschel, H, and H1 Collaboration. 1994. "Photoproduction of J/{psi}mesons at HERA." Germany.
@misc{etde_10108162,
title = {Photoproduction of J/{psi}mesons at HERA}
author = {Ahmed, T, Aid, S, Andreev, V, Andrieu, B, Appuhn, R D, Arpagaus, M, Babaev, A, Baehr, J, Ban, J, Baranov, P, Barrelet, E, Bartel, W, Barth, M, Bassler, U, Beck, H P, Behrend, H J, Belousov, A, Berger, C, Bergstein, H, Bernardi, G, Bernet, R, Bertrand-Coremans, G, Besancon, M, Beyer, R, Biddulph, P, Bizot, J C, Blobel, V, Borras, K, Botterweck, F, Boudry, V, Braemer, A, Brasse, F, Braunschweig, W, Brisson, V, Bruncko, D, Brune, C, Buchholz, R, Buengener, L, Buerger, J, Buesser, F W, Buniatian, A, Burke, S, Buschhorn, G, Campbell, A J, Carli, T, Charles, F, Clarke, D, Clegg, A B, Colombo, M, Contreras, J G, Coughlan, J A, Courau, A, Coutures, C, Cozzika, G, Criegee, L, Cussans, D G, Cvach, J, Dagoret, S, Dainton, J B, Danilov, M, Dau, W D, Daum, K, David, M, Deffur, E, Delcourt, B, Del Buono, L, De Roeck, A, De Wolf, E A, Di Nezza, P, Dollfus, C, Dowell, J D, Dreis, H B, Duboc, J, Duellmann, D, Duenger, O, Duhm, H, Ebert, J, Ebert, T R, Eckerlin, G, Efremenko, V, Egli, S, Ehrlichmann, H, Eichenberger, S, Eichler, R, Eisele, F, Eisenhandler, E, Ellison, R J, Elsen, E, Erdmann, M, Erdmann, W, Evrard, E, Favart, L, Fedotov, A, Feeken, D, Felst, R, Feltesse, J, Ferencei, J, Ferrarotto, F, Flamm, K, Fleischer, M, Flieser, M, Fluegge, G, Fomenko, A, Fominykh, B, Forbush, M, Formanek, J, Foster, J M, Franke, G, Fretwurst, E, Gabathuler, E, Gabathuler, K, Gamerdinger, K, Garvey, J, Gayler, J, Gebauer, M, Gellrich, A, Genzel, H, Gerhards, R, Goerlach, U, Goerlich, L, Gogitidze, N, Goldberg, M, Goldner, D, Gonzalez-Pineiro, B, Goodall, A M, Gorelov, I, Goritchev, P, Grab, C, Graessler, H, Graessler, R, Greenshaw, T, Grindhammer, G, Gruber, A, Gruber, C, Haack, J, Haidt, D, Hajduk, L, Hamon, O, Hampel, M, Hanlon, E M, Hapke, M, Haynes, W J, Heatherington, J, Hedberg, V, Heinzelmann, G, Henderson, R C.W., Henschel, H, and H1 Collaboration}
abstractNote = {We present a study of J/{psi} meson production in collisions of 26.7 GeV electrons with 820 GeV protons, performed with the H1-detector at the HERA collider at DESY. The J/{psi} mesons are detected via their leptonic decays both to electrons and muons. Requiring exactly two particles in the detector, a cross section of {sigma}(ep{yields}J/{psi}X)=(8.8{+-}2.0{+-}2.2) nb is determined for 30 GeV{<=}W{sub {gamma}p}{<=}180 GeV and Q{sup 2}< or {approx}4 GeV{sup 2}. Using the flux of quasi-real photons with Q{sup 2}< or {approx}4 GeV{sup 2}, a total photoproduction cross section of {sigma}({gamma}p{yields}J/{psi}X)=(56{+-}13{+-}14) nb is derived at an average W{sub {gamma}p}=90 GeV. The distribution of the squared momentum transfer t from the proton to the J/{psi} can be fitted using an exponential exp(-bvertical stroke tvertical stroke ) below avertical stroke tvertical stroke of 0.75 GeV{sup 2} yielding a slope parameter of b=(4.7{+-}1.9) GeV{sup -2}. (orig.)}
place = {Germany}
year = {1994}
month = {Aug}
}