In Search of Q2q2 Mesons in Yy Reactions*
نویسنده
چکیده
The structure observed in the reaction yy + pop0 is interpreted as due to 2* (I = 0,2) Q2a2 states with a background contribution from O* (I = 0,2) Q2q2-states.
منابع مشابه
Large - Angle Two - Photon Exclusive Channels in Quantum
Detailed leading order QCD predictions are given for the scaling, angular, and helicity dependence of the reactions yy -f 6 (M=r, K, p, etc.) at large momentum transfer. In addition to providing a basic test of QCD at short distances, measurements can be used to determine the process-independent meson distribution amplitudes $M(x,Q). Other related two-photon channels such as yy+yp, y*y+rO, no, ...
متن کاملEffects of final state interaction in B^+_c to D^0 K^+ decay
In this paper, the decay of Bc+ meson, which consists of two b and c heavy quarks, into the Do and K+ mesons was studied. Given that the experimental branching ratio for this decay was within the range of 3.75*10-5 to 11.16*10-5; it was decided to calculate the theoretical branching ratio by applying the final state interaction (FSI) through the T and cross-section channels. In this process, b...
متن کاملSolving the competitive facility location problem considering the reactions of competitor with a hybrid algorithm including Tabu Search and exact method
In this paper, a leader–follower competitive facility location problem considering the reactions of the competitors is studied. A model for locating new facilities and determining levels of quality for the facilities of the leader firm is proposed. Moreover, changes in the location and quality of existing facilities in a competitive market where a competitor offers the same goods or services ar...
متن کاملThe Effect of Aerobic Training and Spirulina on Nesfatin-1 and Peptide YY in Overweight Elderly Men: A randomized trial
Background and purpose: Research has shown that aging affects appetite and energy intake. The aim of this study was to investigate the protective effect of aerobic training (AT) and spirulina (SP) on Nesfatin-1 and Peptide YY (PYY) in overweight elderly men. Materials and Methods: In this clinical trial study, 32 overweight elderly men (age 57.50±4.84 years, Body mass index: BMI 26.90±2.85 kg/...
متن کاملمقایسه اثر درجات شدت تمرین های مقاومتی دایره ای، بر نسبت گرلین و پپتید YY پلاسمای دانشجویان پسر ورزشکار
Background & Objectives: Ghrelin and peptide YY are orexigenic and anorexigenic peptides, respectively. They affect feeding behaviours and play a pivotal role in energy balance and glucose homeostasis. Resistance training is a key component of physical activity guidelines for weight control however, there is limited information on the effects of different intensities of circuit training on...
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 1981