<![CDATA[Exclusive pi(0) electroproduction at W > 2 GeV with CLAS]]> Exclusive neutral-pion electroproduction (ep → e[superscript ′]p[superscript ′]π[superscript 0]) was measured at Jefferson Lab with a 5.75-GeV electron beam and the CLAS detector. Differential cross sections d[superscript 4]σ/dtdQ[superscript 2]dx[subscript B]dϕ[subscript π] and structure functions σ[subscript T] + εσ[subscript L], σ[subscript TT], and σ[subscript LT] as functions of t were obtained over a wide range of Q[superscript 2] and x[subscript B]. The data are compared with Regge and handbag theoretical calculations. Analyses in both frameworks find that a large dominance of transverse processes is necessary to explain the experimental results. For the Regge analysis it is found that the inclusion of vector meson rescattering processes is necessary to bring the magnitude of the calculated and measured structure functions into rough agreement. In the handbag framework, there are two independent calculations, both of which appear to roughly explain the magnitude of the structure functions in terms of transversity generalized parton distributions.autBedlinskiy, I.autKubarovsky, V.autNiccolai, S.autStoler, P.autAdhikari, K. P.autAnderson, M. D.autPereira, S. AnefalosautAvakian, H.autBall, J.autBaltzell, N. A.autBattaglieri, M.autBatourine, V.autBiselli, A. S.autBoiarinov, S.autBono, J.autBriscoe, W. J.autBrooks, W. K.autBurkert, V. D.autCarman, D. S.autCelentano, A.autChandavar, S.autColaneri, L.autCole, P. L.autContalbrigo, M.autCortes, O.autCrede, V.autD'Angelo, A.autDashyan, N.autDe Vita, R.autDe Sanctis, E.autDeur, A.autDjalali, C.autDoughty, D.autDupre, R.autEgiyan, H.ctbRitchie, BarryctbSenderovich, IgorctbCollege of Liberal Arts and Sciencesengpi0+p (see equation B4 in the article) as a function of four kinematical variables:
(Q2,x_B,t,phi) obtained with the CLAS detector at Jefferson Lab with electron beam energy 5.75 GeV.
Each line in the table corresponds to one kinematical point.
- 1 column is Q2 in GeV2
- 2 column is x_B
- 3 column is -t in GeV2
- 4 column is phi in degrees
- 5 column is differential cross section d2sigma/dtdphi in nb/GeV2
- 6 column is statistical error of the cross section
- 7 column is systematic uncertainty of the cross section
The file supplemental.pdf contains the same information in the PDF format.]]> 2 GeV with CLAS. PHYSICAL REVIEW C, 90(2), 025205. http://dx.doi.org/10.1103/PhysRevC.90.025205]]>10.1103/PhysRevC.90.0252051932-6203https://hdl.handle.net/2286/R.I.2709426 pages114199772141623969609129521In Copyright2014-08-13