کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1850682 1528804 2016 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Twist-3 fragmentation effects for ALT in light hadron production from proton–proton collisions
موضوعات مرتبط
مهندسی و علوم پایه فیزیک و نجوم فیزیک هسته ای و انرژی بالا
پیش نمایش صفحه اول مقاله
Twist-3 fragmentation effects for ALT in light hadron production from proton–proton collisions
چکیده انگلیسی

We compute the contribution from the twist-3 fragmentation function for light hadron production in collisions between transversely and longitudinally polarized protons, i.e., p↑p→→hX, which can cause a double-spin asymmetry (DSA) ALTALT. This is a naïve T-even twist-3 observable that we analyze in collinear factorization using both Feynman gauge and lightcone gauge as well as give a general proof of color gauge invariance. So far only twist-3 effects in the transversely polarized proton have been studied for ALTALT in p↑p→→hX. However, there are indications that the naïve T-odd transverse single-spin asymmetry (SSA) ANAN in p↑p→hX is dominated not by such distribution effects but rather by a fragmentation mechanism. Therefore, one may expect similarly that the fragmentation contribution is important for ALTALT. Given possible plans at RHIC to measure this observable, it is timely to provide a calculation of this term.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Physics Letters B - Volume 752, 10 January 2016, Pages 95–101
نویسندگان
, , , ,