Angular distributions of muon pairs produced by negative pions on deuterium and tungsten
Clicks: 142
ID: 271486
1988
We present the angular distributions of high-mass muon pairs produced in a high-statistics experiment by 140 and 194 GeV/c π− beams impinging on a tungsten target, and by 286 GeV/c π− beam on deuterium and tungsten targets. We find no evidence for a center-of-mass energy dependence or a nuclear dependence of the angular distribution parameters. The two parameters λ and μ are found to be essentially independent of any kinematical variable. In contrast, the parameterv increase with the dimuon transverse momentumPT , at variance with recent perturbative QCD predictions. Our statistics at largex1 are insufficient to substantiate the highertwist prediction.
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| Authors | NA 10 Collaboration,M. Guanziroli,D. A. Jensen,P. Le Coultre,H. Suter,V. L. Telegdi,K. Freudenreich,A. Ereditato,P. Strolin,Paula Bordalo,Ph. Busson,L. Kluberg,A. Romana,R. Salmeron,C. Vallée,J. J. Blaising,A. Degre,P. Juillot,R. Morand,M. Winter;NA 10 Collaboration;M. Guanziroli;D. A. Jensen;P. Le Coultre;H. Suter;V. L. Telegdi;K. Freudenreich;A. Ereditato;P. Strolin;Paula Bordalo;Ph. Busson;L. Kluberg;A. Romana;R. Salmeron;C. Vallée;J. J. Blaising;A. Degre;P. Juillot;R. Morand;M. Winter; |
| Journal | the european physical journal c |
| Year | 1988 |
| DOI | 10.1007/bf01549713 |
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