کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
8188015 | 1528834 | 2013 | 5 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Coulomb gauge model for hidden charm tetraquarks
دانلود مقاله + سفارش ترجمه
دانلود مقاله ISI انگلیسی
رایگان برای ایرانیان
کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
فیزیک و نجوم
فیزیک هسته ای و انرژی بالا
پیش نمایش صفحه اول مقاله

چکیده انگلیسی
The spectrum of tetraquark states with hidden charm is studied within an effective Coulomb gauge Hamiltonian approach. Of the four independent color schemes, two are investigated, the (qc¯)1(cq¯)1 singlet-singlet (molecule) and the (qc)3(q¯c¯)3 triplet-triplet (diquark), for selected JPC states using a variational method. The predicted masses of triplet-triplet tetraquarks are roughly a GeV heavier than the singlet-singlet states. There is also an interesting flavor dependence with (qq¯)1(cc¯1) states about half a GeV lighter than (qc¯)1(q¯c)1. The lightest 1++ and 1ââ predictions are in agreement with the observed X(3872) and Y(4008) masses suggesting they are molecules with ÏJ/Ï and ηhc, rather than DâD¯â and DD¯, type structure, respectively. Similarly, the lightest isovector 1++ molecule, having a ÏJ/Ï flavor composition, has mass near the recently observed charged Zc(3900) value. These flavor configurations are consistent with observed X, Y and Zc decays to ÏÏJ/Ï.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Physics Letters B - Volume 725, Issues 1â3, 9 August 2013, Pages 148-152
Journal: Physics Letters B - Volume 725, Issues 1â3, 9 August 2013, Pages 148-152
نویسندگان
W. Xie, L.Q. Mo, Ping Wang, Stephen R. Cotanch,