Study of η^′→ηπ⁺π⁻ Dalitz plot

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• 作者：V. Dorofeev ; R. Dzheliadin ; A. Ekimov ; A. Fenyuk ; Yu. Gavrilov ; Yu. Gouz ; A. Ivashin ; V. Kabachenko ; I. Kachaev ; A. Karyukhin ; Yu. Khokhlov ; A. Konoplyannikov ; V. Konstantinov ; M. Makouski ; V. Matveev
• 关键词：Two-photon collisions ; Mesons ; QCD ; Charmonium
• 刊名：Physics Letters B
• 出版年：2007
• 出版时间：19 July 2007
• 年：2007
• 卷：651
• 期：1
• 页码：22-26
• 全文大小：381 K

文摘

The Dalitz plot of the <a name=""mml12"">a><a style=""text-decoration:none; color:black"" href=""/science?_ob=MathURL&_method=retrieve&_udi=B6TVN-4NWWW7S-3&_mathId=mml12&_user=10&_cdi=5539&_rdoc=5&_acct=C000050221&_version=1&_userid=10&md5=39536db44d646df83888b594d64c434b"" title=""Click to view the MathML source"">η^′→ηπ⁺π⁻a> decay is studied using the data collected with the VES spectrometer in two different exclusive reactions, <a name=""mml13"">a><a style=""text-decoration:none; color:black"" href=""/science?_ob=MathURL&_method=retrieve&_udi=B6TVN-4NWWW7S-3&_mathId=mml13&_user=10&_cdi=5539&_rdoc=5&_acct=C000050221&_version=1&_userid=10&md5=b7381430561e8b375a1285c39641bd8c"" title=""Click to view the MathML source"">π⁻p→η^′na> (charge-exchange) and <a name=""mml14"">a><a style=""text-decoration:none; color:black"" href=""/science?_ob=MathURL&_method=retrieve&_udi=B6TVN-4NWWW7S-3&_mathId=mml14&_user=10&_cdi=5539&_rdoc=5&_acct=C000050221&_version=1&_userid=10&md5=221c60da0a8e113c3186f44a854958d9"" title=""Click to view the MathML source"">π⁻N→η^′π⁻Na> (diffractive-like production). The η mesons from <a name=""mml15"">a><a style=""text-decoration:none; color:black"" href=""/science?_ob=MathURL&_method=retrieve&_udi=B6TVN-4NWWW7S-3&_mathId=mml15&_user=10&_cdi=5539&_rdoc=5&_acct=C000050221&_version=1&_userid=10&md5=ab25e3799bac6be4936ae8f6058268ea"" title=""Click to view the MathML source"">η^′a> decays were detected in the <a name=""mml16"">a><a style=""text-decoration:none; color:black"" href=""/science?_ob=MathURL&_method=retrieve&_udi=B6TVN-4NWWW7S-3&_mathId=mml16&_user=10&_cdi=5539&_rdoc=5&_acct=C000050221&_version=1&_userid=10&md5=488918021216805f740c7e19d982b9b8"" title=""Click to view the MathML source"">η→γγa> mode. The coefficients for the matrix element squared decomposition are measured on the largest statistics of <a name=""mml17"">a><a style=""text-decoration:none; color:black"" href=""/science?_ob=MathURL&_method=retrieve&_udi=B6TVN-4NWWW7S-3&_mathId=mml17&_user=10&_cdi=5539&_rdoc=5&_acct=C000050221&_version=1&_userid=10&md5=334b159a41a938eb4503190cbebb985f"" title=""Click to view the MathML source"">η^′a> decays reported so far; there are <a name=""mml18"">a><a style=""text-decoration:none; color:black"" href=""/science?_ob=MathURL&_method=retrieve&_udi=B6TVN-4NWWW7S-3&_mathId=mml18&_user=10&_cdi=5539&_rdoc=5&_acct=C000050221&_version=1&_userid=10&md5=bfca209ca2fddffaa1bbf1c53909dadf"" title=""Click to view the MathML source"">alt=""not, vert, similar"" border=0>13.6×10³a> and <a name=""mml19"">a><a style=""text-decoration:none; color:black"" href=""/science?_ob=MathURL&_method=retrieve&_udi=B6TVN-4NWWW7S-3&_mathId=mml19&_user=10&_cdi=5539&_rdoc=5&_acct=C000050221&_version=1&_userid=10&md5=67d67bef47f558d9eb0e67861c90ffa3"" title=""Click to view the MathML source"">alt=""not, vert, similar"" border=0>6.5×10³a> decays after background subtraction in charge-exchange and diffractive-like production, respectively.