Cross sections for inclusive direct photon production in -p, +p, and pp collisions at 300 GeV/c are measured at transverse momenta pT up to 7 GeV/c (xT=0.6). For -pX also the rapidity distribution is presented. The cross-section ratio (-pX)/(+pX) is found to be 1 at pT=4 GeV/c and rises with increasing pT. This observation signals the occurrence of valence-quarkantiquark annihilation. The results are in good agreement with QCD predictions.

Measurement of direct photon production at large transverse momentum in π−p, π+p, and pp collisions at 300 GeV/c / de Marzo, C., de Palma, M., Favuzzi, C., Maggi, G., Nappi, E., Posa, F., Ranieri, A., Selvaggi, G., Spinelli, P., Bamberger, A., Fuchs, M., Heck, W., Loos, C., Marx, R., Runge, K., Skodzek, E., Weber, C., Wülker, M., Zetsche, F., Artemiev, V., et al.. - In: PHYSICAL REVIEW D. - ISSN 0556-2821. - STAMPA. - 36:1(1987), pp. 8-15. [10.1103/PhysRevD.36.8]

Measurement of direct photon production at large transverse momentum in π−p, π+p, and pp collisions at 300 GeV/c

Favuzzi, C.;Maggi, G.;
1987

Abstract

Cross sections for inclusive direct photon production in -p, +p, and pp collisions at 300 GeV/c are measured at transverse momenta pT up to 7 GeV/c (xT=0.6). For -pX also the rapidity distribution is presented. The cross-section ratio (-pX)/(+pX) is found to be 1 at pT=4 GeV/c and rises with increasing pT. This observation signals the occurrence of valence-quarkantiquark annihilation. The results are in good agreement with QCD predictions.
1987
Measurement of direct photon production at large transverse momentum in π−p, π+p, and pp collisions at 300 GeV/c / de Marzo, C., de Palma, M., Favuzzi, C., Maggi, G., Nappi, E., Posa, F., Ranieri, A., Selvaggi, G., Spinelli, P., Bamberger, A., Fuchs, M., Heck, W., Loos, C., Marx, R., Runge, K., Skodzek, E., Weber, C., Wülker, M., Zetsche, F., Artemiev, V., et al.. - In: PHYSICAL REVIEW D. - ISSN 0556-2821. - STAMPA. - 36:1(1987), pp. 8-15. [10.1103/PhysRevD.36.8]
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11589/1212
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