Comparison of direct photon production in pp collisions at <span class="math"><math><mtext>s</mtext><mtext>= 30.6 </mtext><mtext>GeV</mtext></math></span> and 53.2 GeV期刊界 All Journals 搜尽天下杂志传播学术成果专业期刊搜索期刊信息化学术搜索

Comparison of direct photon production in pp collisions at $s = 30.6 GeV$ and 53.2 GeV

Authors:	E. Amaldi M. Beneventano B. Borgia A. Capone F. De Notaristefani U. Dore F. Ferroni E. Longo L. Luminari P. Pistilli I. Sestili G.F. Dell L.C.L. Yuan G. Kantardjian

Affiliation:	1. Istituto di Fisica “G. Marconi” dell''Università, Rome, Italy;2. Istituto Nazionale di Fisica Nucleare, Sezione di Roma, Italy

Abstract:	We present data obtained at the ISR, on the determination of the ratio $R = γ π^{0} at s = 30.6$ GeV and we compare the results with our previous measurement at $s = 53.2$ GeV. The ratio $R = γ π^{0}$ integrated over the interval 0.1 ? χ_T ? 0.2 is (1.6 ± 0.5) × 10^?2 and we obtain an indication of a universal χ_T dependence.

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