TY - JOUR
T1 - QCD and e+e- → baryon + antibaryon
AU - Karliner, Marek
AU - Nussinov, Shmuel
N1 - Funding Information:
The research of one of us (M.K.) was supported in part by a grant from the United States-Israel Binational Science Foundation (BSF), Jerusalem, Israel. Both M.K. and S.N. were supported in part by the Basic Research Foundation administered by the Israel Academy of Sciences and Humanities. We would like to thank John Ellis for useful comments on the manuscript.
PY - 2002/7/4
Y1 - 2002/7/4
N2 - We discuss the QCD constraints on e+e- → baryon-antibaryon close to threshold, in light of the puzzling experimental data which indicate that close to threshold σ(e+e- → nn̄) > σ(e+e- → pp̄). We focus on the process e+e- → ΔΔ̄, which is particularly simple from the theoretical point of view. In this case it is possible to make exact QCD predictions for the relative yields of the four members of the Δ multiplet, modulo one crucial dynamical assumption.
AB - We discuss the QCD constraints on e+e- → baryon-antibaryon close to threshold, in light of the puzzling experimental data which indicate that close to threshold σ(e+e- → nn̄) > σ(e+e- → pp̄). We focus on the process e+e- → ΔΔ̄, which is particularly simple from the theoretical point of view. In this case it is possible to make exact QCD predictions for the relative yields of the four members of the Δ multiplet, modulo one crucial dynamical assumption.
UR - http://www.scopus.com/inward/record.url?scp=18544399940&partnerID=8YFLogxK
U2 - 10.1016/S0370-2693(02)02033-6
DO - 10.1016/S0370-2693(02)02033-6
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AN - SCOPUS:18544399940
SN - 0370-2693
VL - 538
SP - 321
EP - 326
JO - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
JF - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
IS - 3-4
ER -