Baryon Regge trajectories in the light of the 1/N_c expansion

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• 作者：J.L. Goity ; N. Matagne
• 关键词：Effective interaction ; Compensation equation ; QCD infrared region
• 刊名：Physics Letters B
• 出版年：2007
• 期刊代码：58_03702693
• 类别：ph
• 出版时间：8 November 2007
• 卷：655
• 期：5-6
• 页码：223-227
• 文件大小：132 K

摘要

We analyze Regge trajectories in terms of the name="mml135">n:none; color:black" href="/science?_ob=MathURL&_method=retrieve&_udi=B6TVN-4PKPGP8-9&_mathId=mml135&_user=10&_cdi=5539&_rdoc=5&_acct=C000050221&_version=1&_userid=10&md5=2a1d0ba071b9c071a2a353f8176e7e01" title="Click to view the MathML source">1/N_c expansion of QCD. Neglecting spin–orbit contributions to the large name="mml136">n:none; color:black" href="/science?_ob=MathURL&_method=retrieve&_udi=B6TVN-4PKPGP8-9&_mathId=mml136&_user=10&_cdi=5539&_rdoc=5&_acct=C000050221&_version=1&_userid=10&md5=55312bd14988fd810d48569f437892d9" title="Click to view the MathML source">N_c baryon mass operator, we consider the evolution of the spin-flavor singlet component of the masses with respect to the angular momentum. We find two distinct and remarkably linear Regge trajectories for symmetric and for mixed symmetric spin-flavor multiplets.