Transverse momentum dependence of semi-inclusive pion production

H. Mkrtchyan, P. E. Bosted, G. S. Adams, A. Ahmidouch, T. Angelescu, J. Arrington, R. Asaturyan, O. K. Baker, N. Benmouna, C. Bertoncini, H. P. Blok, W. U. Boeglin, H. Breuer, M. E. Christy, S. H. Connell, Y. Cui, M. M. Dalton, S. Danagoulian, D. Day, T. DodarioJ. A. Dunne, D. Dutta, N. El Khayari, R. Ent, H. C. Fenker, V. V. Frolov, L. Gan, D. Gaskell, K. Hafidi, W. Hinton, R. J. Holt, T. Horn, G. M. Huber, E. Hungerford, X. Jiang, M. Jones, K. Joo, N. Kalantarians, J. J. Kelly, C. E. Keppel, V. Kubarovsky, Y. Li, Y. Liang, S. Malace, P. Markowitz, E. McGrath, P. McKee, D. G. Meekins, B. Moziak, T. Navasardyan, G. Niculescu, I. Niculescu, A. K. Opper, T. Ostapenko, P. E. Reimer, J. Reinhold, J. Roche, S. E. Rock, E. Schulte, E. Segbefia, C. Smith, G. R. Smith, P. Stoler, V. Tadevosyan, L. Tang, M. Ungaro, A. Uzzle, S. Vidakovic, A. Villano, W. F. Vulcan, M. Wang, G. Warren, F. Wesselmann, B. Wojtsekhowski, S. A. Wood, C. Xu, L. Yuan, X. Zheng, H. Zhu

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59 Citations (Scopus)


Cross sections for semi-inclusive electroproduction of charged pions (π±) from both proton and deuteron targets were measured for 0.2 < x < 0.5, 2 < Q2 < 4 GeV2, 0.3 < z < 1, and Pt 2 < 0.2 GeV2. For Pt < 0.1 GeV, we find the azimuthal dependence to be small, as expected theoretically. For both π+ and π-, the Pt dependence from the deuteron is found to be slightly weaker than from the proton. In the context of a simple model, this implies that the initial transverse momenta width of d quarks is larger than for u quarks and, contrary to expectations, the transverse momentum width of the favored fragmentation function is larger than the unfavored one.

Original languageEnglish
Pages (from-to)20-25
Number of pages6
JournalPhysics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Issue number1
Publication statusPublished - 3 Jul 2008
Externally publishedYes

ASJC Scopus subject areas

  • Nuclear and High Energy Physics


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