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20 April 2024

» arxiv » 0709.3020

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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. Dodario ; J.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 ;
Date:	19 Sep 2007
Abstract:	Cross sections for semi-inclusive electroproduction of charged pions ($pi^{pm}$) from both proton and deuteron targets were measured for $0.2<x<0.5$, $2<Q^2<4$ GeV$^2$, $0.3<z<1$, and $P_t^2<0.2$ GeV$^2$. We find the azimuthal dependence to be small and consistent with zero, for $P_t<0.1$ GeV. In the context of a simple fit, the initial transverse momenta of $d$ quarks tends to be larger than for $u$ quarks, while the transverse momentum width of the favored fragmentation function is slightly larger than that of the unfavored function.
Source:	arXiv, 0709.3020
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