کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
8194338 1528890 2010 5 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Spin alignment of vector mesons in heavy ion and proton-proton collisions
موضوعات مرتبط
مهندسی و علوم پایه فیزیک و نجوم فیزیک هسته ای و انرژی بالا
پیش نمایش صفحه اول مقاله
Spin alignment of vector mesons in heavy ion and proton-proton collisions
چکیده انگلیسی
The spin alignment matrix element ρ00 for the vector mesons K∗0 and ϕ(1020) has been measured in RHIC at central rapidities. These measurements are consistent with the absence of polarization with respect to the reaction plane in mid-central Au+Au collisions whereas, when measured with respect to the production plane in the same reactions and in p+p collisions, a non-vanishing and p⊥-dependent ρ00 is found. We show that this behavior can be understood in a simple model of vector meson production where the spin of their constituent quarks is oriented during hadronization as the result of Thomas precession.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Physics Letters B - Volume 682, Issues 4–5, 4 January 2010, Pages 408-412
نویسندگان
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