Measurement of elastic $\rho^0$ photoproduction at HERA
Creators: name: Derrick, M.
name: Krakauer, D.
name: Magill, S.
name: Mikunas, D.
name: Musgrave, B.
name: Repond, J.
name: Stanek, R.
name: Talaga, R. L.
name: Zhang, H.
name: Ayad, R.
name: Bari, G.
name: Basile, M.
name: Bellagamba, L.
name: Boscherini, D.
name: Bruni, A.
name: Bruni, G.
name: Bruni, P.
name: Cara Romeo, G.
name: Castellini, G.
name: Chiarini, M.
name: Cifarelli, L.
name: Cindolo, F.
name: Contin, A.
name: Corradi, M.
name: Gialas, I.
name: Giusti, P.
name: Iacobucci, G.
name: Laurenti, G.
name: Levi, G.
name: Margotti, A.
name: Massam, T.
name: Nania, R.
name: Nemoz, C.
name: Palmonari, F.
name: Polini, A.
name: Sartorelli, G.
name: Timellini, R.
name: Zamora Garcia, Y.
name: Zichichi, A.
name: Bargende, A.
name: Bornheim, A.
name: Crittenden, J.
name: Desch, K.
name: Diekmann, B.
name: Doeker, T.
name: Eckert, M.
name: Feld, L.
name: Frey, A.
name: Geerts, M.
name: Grothe, M.
name: Hartmann, H.
name: Heinloth, K.
name: Hilger, E.
name: Jakob, H. P.
name: Katz, U. F.
name: Mengel, S.
name: Mollen, J.
name: Paul, E.
name: Pfeiffer, M.
name: Rembser, C.
name: Schramm, D.
name: Stamm, J.
name: Wedemeyer, R.
name: Campbell-Robson, S.
name: Cassidy, A.
name: Dyce, N.
name: Foster, B.
name: George, S.
name: Gilmore, R.
name: Heath, G. P.
name: Heath, Helen F.
name: Llewellyn, T. J.
name: Morgado, C. J. S.
name: Norman, D. J. P.
name: O'Mara, J. A.
name: Tapper, R. J.
name: Wilson, S. S.
name: Yoshida, R.
name: Rau, R. R.
name: Arneodo, M.
name: Capua, M.
name: Garfagnini, A.
name: Iannotti, L.
name: Schioppa, M.
name: Susinno, G.
name: Bernstein, A.
name: Caldwell, A.
name: Cartiglia, N.
name: Parsons, J. A.
name: Ritz, S.
name: Sciulli, F.
name: Straub, P. B.
name: Wai, L.
name: Yang, S.
name: Zhu, Q.
name: Borzemski, P.
name: Chwastowski, J.
name: Eskreys, A.
name: Piotrzkowski, K.
name: Zachara, M.
name: Zawiejski, L.
name: Adamczyk, L.
name: Bednarek, B.
name: Jelen, K.
name: Kisielewska, D.
name: Kowalski, T.
name: Rulikowska-Zarebska, E.
name: Suszycki, L.
name: Zajac, J.
name: Kotanski, A.
name: Przybycien, M.
name: Bauerdick, L. A. T.
name: Behrens, U.
name: Beier, H.
name: Bienlein, J. K.
name: Coldewey, C.
name: Deppe, O.
name: Desler, K.
name: Drews, G.
name: Flasinski, M.
name: Gilkinson, D. J.
name: Glasman, C.
name: Gottlicher, P.
name: Grosse-Knetter, J.
name: Gutjahr, B.
name: Haas, Tobias M.
name: Hain, W.
name: Hasell, D.
name: Hessling, H.
name: Iga, Y.
name: Johnson, K.
name: Joos, P.
name: Kasemann, M.
name: Klanner, R.
name: Koch, W.
name: Kopke, L.
name: Kotz, U.
name: Kowalski, H.
name: Labs, J.
name: Ladage, A.
name: Lohr, B.
name: Lowe, M.
name: Luke, D.
name: Mainusch, J.
name: Manczak, O.
name: Monteiro, T.
name: Ng, J. S. T.
name: Nickel, S.
name: Notz, D.
name: Ohrenberg, K.
name: Roco, M.
name: Rohde, M.
name: Roldan, J.
name: Schneekloth, U.
name: Schulz, W.
name: Selonke, F.
name: Stiliaris, E.
name: Surrow, B.
name: Voss, T.
name: Westphal, D.
name: Wolf, G.
name: Youngman, C.
name: Zeuner, W.
name: Zhou, J. F.
name: Grabosch, H. J.
name: Kharchilava, A.
name: Leich, A.
name: Mattingly, M.
name: Mari, S. M.
name: Meyer, A.
name: Schlenstedt, S.
name: Wulff, N.
name: Barbagli, G.
name: Pelfer, P.
name: Anzivino, G.
name: Maccarrone, G.
name: De Pasquale, S.
name: Votano, L.
name: Bamberger, A.
name: Eisenhardt, S.
name: Freidhof, A.
name: Soldner-Rembold, S.
name: Schroeder, J.
name: Trefzger, T.
name: Brook, N. H.
name: Bussey, P. J.
name: Doyle, A. T.
name: Saxon, D. H.
name: Utley, M. L.
name: Wilson, A. S.
name: Dannemann, A.
name: Holm, U.
name: Horstmann, D.
name: Neumann, T.
name: Sinkus, R.
name: Wick, K.
name: Badura, E.
name: Burow, B. D.
name: Hagge, L.
name: Lohrmann, E.
name: Milewski, J.
name: Nakahata, M.
name: Pavel, N.
name: Poelz, G.
name: Schott, W.
name: Zetsche, F.
name: Bacon, T. C.
name: Brummer, N.
name: Butterworth, I.
name: Gallo, E.
name: Harris, V. L.
name: Hung, B. H. Y.
name: Long, K. R.
name: Miller, D. B.
name: Morawitz, P. P. O.
name: Prinias, A.
name: Sedgbeer, J. K.
name: Whitfield, A.
name: Mallik, U.
name: McCliment, E.
name: Wang, M. Z.
name: Wang, S. M.
name: Wu, J. T.
name: Cloth, P.
name: Filges, D.
name: An, S. H.
name: Hong, S. M.
name: Nam, S. W.
name: Park, S. K.
name: Suh, M. H.
name: Yon, S. H.
name: Imlay, R.
name: Kartik, S.
name: Kim, H. J.
name: McNeil, R. R.
name: Metcalf, W.
name: Nadendla, V. K.
name: Barreiro, F.
name: Cases, G.
name: Fernandez, J. P.
name: Graciani, R.
name: Hernandez, J. M.
name: Hervas, L.
name: Labarga, L.
name: Martinez, M.
name: del Peso, J.
name: Puga, J.
name: Terron, J.
name: de Troconiz, J. F.
name: Smith, G. R.
name: Corriveau, F.
name: Hanna, D. S.
name: Hartmann, J.
name: Hung, L. W.
name: Lim, J. N.
name: Matthews, C.
name: Patel, P. M.
name: Sinclair, L. E.
name: Stairs, D. G.
name: St. Laurent, M.
name: Ullmann, R.
name: Zacek, G.
name: Bashkirov, V.
name: Dolgoshein, B. A.
name: Stifutkin, A.
name: Bashindzhagian, G. L.
name: Ermolov, P. F.
name: Gladilin, L. K.
name: Golubkov, Yu. A.
name: Kobrin, V. D. D.
name: Korzhavina, I. A.
name: Kuzmin, V. A.
name: Lukina, O. Yu.
name: Proskuryakov, A. S.
name: Savin, A. A.
name: Shcheglova, L. M.
name: Solomin, A. N.
name: Zotov, N. P.
name: Botje, M.
name: Chlebana, F.
name: Dake, A.
name: Engelen, J.
name: de Kamps, M.
name: Kooijman, P.
name: Kruse, A.
name: Tiecke, H.
name: Verkerke, W.
name: Vreeswijk, M.
name: Wiggers, L.
name: de Wolf, E.
name: van Woudenberg, R.
name: Acosta, D.
name: Bylsma, B.
name: Durkin, L. S.
name: Gilmore, J.
name: Honscheid, K.
name: Li, C.
name: Ling, T. Y.
name: McLean, K. W.
name: Murray, W. N.
name: Nylander, P.
name: Park, I. H.
name: Romanowski, T. A.
name: Seidlein, R.
name: Bailey, David C.
name: Byrne, J.
name: Cashmore, R. J.
name: Cooper-Sarkar, Amanda M.
name: Devenish, R. C. E.
name: Harnew, N.
name: Lancaster, M.
name: Lindemann, L.
name: McFall, J.
name: Nath, C.
name: Noyes, V. A.
name: Quadt, A.
name: Tickner, J. R.
name: Uijterwaal, H.
name: Walczak, R.
name: Waters, D. S.
name: Wilson, F. F.
name: Yip, T.
name: Abbiendi, G.
name: Bertolin, A.
name: Brugnera, R.
name: Carlin, R.
name: Dal Corso, F.
name: De Giorgi, M.
name: Dosselli, U.
name: Limentani, S.
name: Morandin, M.
name: Posocco, M.
name: Stanco, L.
name: Stroili, R.
name: Voci, C.
name: Bulmahn, J.
name: Butterworth, J. M.
name: Feild, R. G.
name: Oh, B. Y.
name: Whitmore, J.
name: D'Agostini, G.
name: Marini, G.
name: Nigro, A.
name: Tassi, E.
name: Hart, J. C.
name: McCubbin, N. A.
name: Prytz, K.
name: Shah, T. P.
name: Short, T. L.
name: Barberis, E.
name: Dubbs, T.
name: Heusch, C.
name: Van Hook, M.
name: Lockman, William S.
name: Rahn, J. T.
name: Sadrozinski, H. F.
name: Seiden, A.
name: Williams, D. C.
name: Biltzinger, J.
name: Seifert, R. J.
name: Schwarzer, O.
name: Walenta, A. H.
name: Zech, Gunter
name: Abramowicz, H.
name: Briskin, G.
name: Dagan, S.
name: Levy, A.
name: Fleck, J. I.
name: Hasegawa, T.
name: Hazumi, M.
name: Ishii, T.
name: Kuze, M.
name: Mine, S.
name: Nagasawa, Y.
name: Nakao, M.
name: Suzuki, I.
name: Tokushuku, K.
name: Yamada, S.
name: Yamazaki, Y.
name: Chiba, M.
name: Hamatsu, R.
name: Hirose, T.
name: Homma, K.
name: Kitamura, S.
name: Nakamitsu, Y.
name: Yamauchi, K.
name: Cirio, R.
name: Costa, M.
name: Ferrero, M. I.
name: Lamberti, L.
name: Maselli, S.
name: Peroni, C.
name: Sacchi, R.
name: Solano, A.
name: Staiano, A.
name: Dardo, M.
name: Bailey, David C.
name: Bandyopadhyay, D.
name: Benard, F.
name: Brkic, M.
name: Gingrich, D. M.
name: Hartner, G. F.
name: Joo, K. K.
name: Levman, G. M.
name: Martin, J. F.
name: Orr, R. S.
name: Polenz, S.
name: Sampson, Cortney R.
name: Teuscher, R. J.
name: Catterall, C. D.
name: Jones, T. W.
name: Kaziewicz, P. B.
name: Lane, J. B.
name: Saunders, R. L.
name: Shulman, J.
name: Blankenship, K.
name: Lu, B.
name: Mo, L. W.
name: Bogusz, W.
name: Charchula, K.
name: Ciborowski, J.
name: Gajewski, J.
name: Grzelak, G.
name: Kasprzak, M.
name: Krzyzanowski, M.
name: Muchorowski, K.
name: Nowak, R. J.
name: Pawlak, J. M.
name: Tymieniecka, T.
name: Wroblewski, A. K.
name: Zakrzewski, Janusz Andrzej
name: Zarnecki, A. F.
name: Adamus, M.
name: Eisenberg, Y.
name: Karshon, U.
name: Revel, D.
name: Zer-Zion, D.
name: Ali, I.
name: Badgett, W. F.
name: Behrens, B.
name: Dasu, S.
name: Fordham, C.
name: Foudas, C.
name: Goussiou, A.
name: Loveless, R. J.
name: Reeder, D. D.
name: Silverstein, S.
name: Smith, W. H.
name: Vaiciulis, A.
name: Wodarczyk, M.
name: Tsurugai, T.
name: Bhadra, S.
name: Cardy, M. L.
name: Fagerstroem, C. P.
name: Frisken, William R.
name: Furutani, K. M.
name: Khakzad, M.
name: Schmidke, W. B.
name: ZEUS Collaboration
Publisher: name: Deutsches Elektronen-Synchrotron, DESY, Hamburg
Year: 1995
Subjects: subject: 530
subject: electron p: colliding beams
subject: colliding beams: electron p
subject: photon p: interaction
subject: interaction: photon p
subject: mass spectrum: (pi+ pi-)
subject: (pi+ pi-): mass spectrum
subject: rho(770)0: photoproduction
subject: photoproduction: rho(770)0
subject: elastic scattering: rho(770) p
subject: rho(770) p: elastic scattering
subject: differential cross section: energy dependence
subject: energy dependence: differential cross section
subject: channel cross section
subject: rho(770)0: polarization
subject: polarization: rho(770)0
subject: polarization: transverse
subject: transverse: polarization
subject: helicity: conservation law
subject: ZEUS
subject: experimental results
subject: DESY HERA Stor
subject: bibliography
subject: 60-80 GeV-cms (photon)

description: Elastic $\rho~0$ photoproduction has been measured using the ZEUS detector at HERA. Untagged photoproduction events from $ep$ interactions were used to measure the reaction $\gamma p \rightarrow \rho~0 p$ ($\rho~0 \rightarrow \pi~+ \pi~-$) at photon-proton centre-of-mass energies between 60 and 80GeV and $|t|&lt;0.5$GeV$~2$, where $t$ is the square of the four-momentum transferred at the proton vertex. The differential cross section $d\sigma/dM_{\pi\pi}$, where $M_{\pi\pi}$ is the invariant mass of the two pions, and the integrated cross section, $\sigma_{\gamma p\rightarrow \rho~0 p}$, are presented; the latter was measured to be $14.7\pm 0.4(\mbox{stat.})\pm2.4(\mbox{syst.})\mu\mbox{b}$. The differential cross section $d\sigma/dt$ has an approximately exponential shape; a fit of the type $A~{\prime}_{t} \exp{(-b~{\prime}_{t}|t| + c~{\prime}_{t} t~2)}$ yields a $t$-slope $b~{\prime}_{t}= 9.9\pm1.2(\mbox{stat.})\pm 1.4(\mbox{syst.})\mu\mbox{b}$. The results, when compared to low energy data, show a weak energy dependence of both $\sigma_{\gamma p\rightarrow \rho~0 p}$ and of the $t$-slope. The $\rho~0$ is produced predominantly with transverse polarisation, demonstrating that $s$-channel helicity conservation holds at these energies.