Zhao, Y.x. Et Al. (2015) Double Spin Asymmetries of Inclusive Hadron Electroproduction from a Transversely Polarized 3he Target. Physical Review C, Double Spin Asymmetries of Inclusive Hadron Electroproductions from a Transversely Polarized 3 He Target
نویسندگان
چکیده
There may be differences between this version and the published version. You are advised to consult the publisher's version if you wish to cite from it. 2 We report the measurement of beam-target double-spin asymmetries (ALT) in the inclusive production of identified hadrons, e + 3 He ↑ → h + X, using a longitudinally polarized 5.9 GeV electron beam and a transversely polarized 3 He target. Hadrons (π ± , K ± and proton) were detected at 16 • with an average momentum =2.35 GeV/c and a transverse momentum (pT) coverage from 0.60 to 0.68 GeV/c. Asymmetries from the 3 He target were observed to be non-zero for π ± production when the target was polarized transversely in the horizontal plane. The π + and π − asymmetries have opposite signs, analogous to the behavior of ALT in semi-inclusive deep-inelastic scattering.
منابع مشابه
0 Single Spin Asymmetries in Semi - Inclusive Electroproduction : Access to Transversity
We discuss the quark transversity distribution function and a possible way to access it through the measurement of single spin azimuthal asymmetry in semiinclusive single pion electroproduction on a transversely polarized target. At leading order in 1/Q, the cross section for a hard scattering process is given by the convolution of a hard part and a soft part. The former describes the scatterin...
متن کاملar X iv : h ep - p h / 02 11 32 6 v 1 2 0 N ov 2 00 2 Azimuthal Asymmetries : Access to Novel Structure Functions
One of the most interesting consequence of non-zero intrinsic transverse momentum of partons in the nucleon is the nontrivial azimuthal dependence of the cross section of hard scattering processes. Many of the observable asymmetries contain unknown functions which provide essential information on the quark and gluon structure. Several of them have been studied in the last few years; we discuss ...
متن کاملSemi-inclusive Hadron-hadron Transverse Spin Asymmetries and Their Implication for Polarized Dis
We discuss 1 a possible explanation of the 25 year old mystery of the large transverse spin asymmetries found in many semi-inclusive hadron-hadron reactions. We obtain the first reliable information about the transverse polarized quark densities ∆T q(x) and we find surprising implications for the usual, longitudinal, polarized DIS. The plan of the presentation is as follows: 1) A brief reminder...
متن کاملNovel Transversity Properties in SIDIS
We consider a rescattering mechanism to calculate a leading twist T -odd pion fragmentation function, a candidate for filtering the transversity properties of the nucleon. We evaluate the single spin azimuthal asymmetry for a transversely polarized target in semi-inclusive deep inelastic scattering (for HERMES kinematics) and the double T -odd cos2φ asymmetry in this framework. Introduction The...
متن کاملSingle/Double-Spin Asymmetry Measurements of Semi-Inclusive Pion Electroproduction on a Transversely Polarized He Target through Deep Inelastic Scattering
Parton distribution functions, which represent the flavor and spin structure of the nucleon, provide invaluable information in illuminating quantum chromodynamics in the confinement region. Among various processes that measure such parton distribution functions, semi-inclusive deep inelastic scattering is regarded as one of the golden channels to access transverse momentum dependent parton dist...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
عنوان ژورنال:
دوره شماره
صفحات -
تاریخ انتشار 2015