ISSN:
1434-6052
Source:
Springer Online Journal Archives 1860-2000
Topics:
Physics
Notes:
Abstract Inclusive transverse momentum spectra of charged particles in photoproduction events in the laboratory pseudorapidity range −1.2〈η〈1.4 have been measured up top T =8 GeV usign the ZEUS detector. Diffractive and non-diffractive reactions have been selected with an average γp centre of mass (c.m.) energy of 〈W〉=180 GeV. For diffractive reactions, thep T spectra of the photon dissociation events have been measured in two intervals of the dissociated photon mass with mean values 〈M X 〉=5 GeV and 10 GeV. The inclusive transverse momentum spectra fall exponentially in the lowp T region. The non-diffractive data show a pronounced highp T tail departing from the exponential shape. Thep T distributions are compared to lower energy photoproduction data and to hadron-hadron collisions at a similar c.m. energy. The data are also compared to the results of a next-to-leading order QCD calculation.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF01571283