ITP OpenIR  > 理论物理所2016年知识产出
Discussion on triangle singularities in the Lambda(b) -> J/psi K(-)p reaction
Bayar, M; Aceti, F; Guo, FK; Oset, E; Bayar, M (reprint author), Kocaeli Univ, Dept Phys, TR-41380 Izmit, Turkey.; Bayar, M (reprint author), Univ Valencia, Inst Invest Paterna, Dept Fis Teor, Ctr Mixto,CSIC, Apartado 22085, Valencia 46071, Spain.; Bayar, M (reprint author), Univ Valencia, Inst Invest Paterna, IFIC, Ctr Mixto,CSIC, Apartado 22085, Valencia 46071, Spain.
2016
发表期刊PHYSICAL REVIEW D
卷号94期号:7页码:74039
文章类型Article
摘要We have analyzed the singularities of a triangle loop integral in detail and derived a formula for an easy evaluation of the triangle singularity on the physical boundary. It is applied to the Lambda(b) -> J/psi K(-)p process via Lambda*-charmonium-proton intermediate states. Although the evaluation of absolute rates is not possible, we identify the chi(c1) and the psi(2S)as the relatively most relevant states among all possible charmonia up to the psi(2S). The Lambda(1890)chi(c1)p loop is very special, as its normal threshold and triangle singularities merge at about 4.45 GeV, generating a narrow and prominent peak in the amplitude in the case that the chi(c1)p is in an S wave. We also see that loops with the same charmonium and other Lambda* hyperons produce less dramatic peaks from the threshold singularity alone. For the case of chi(c1)p -> J/psi p and quantum numbers 3/2(-) or 5/2(+), one needs P and D waves, respectively, in the chi(c1)p, which drastically reduce the strength of the contribution and smooth the threshold peak. In this case, we conclude that the singularities cannot account for the observed narrow peak. In the case of 1/2(+), 3/2(-) quantum numbers, where chi(c1)p -> J/psi p can proceed in an S wave, the Lambda(1890)chi(c1)p triangle diagram could play an important role, though neither can assert their strength without further input from experiments and lattice QCD calculations.
学科领域Astronomy & Astrophysics ; Physics
资助者Spanish Ministerio de Economia y Competitividad ; Spanish Ministerio de Economia y Competitividad ; European FEDER funds [FIS2011-28853-C02-01] ; European FEDER funds [FIS2011-28853-C02-01] ; Generalitat Valenciana in the program Prometeo II [2014/068] ; Generalitat Valenciana in the program Prometeo II [2014/068] ; Spanish Excellence Network on Hadronic Physics [FIS2014-57026-REDT] ; Spanish Excellence Network on Hadronic Physics [FIS2014-57026-REDT] ; DFG ; DFG ; NSFC [CRC 110, 11621131001] ; NSFC [CRC 110, 11621131001] ; Chinese Academy of Sciences [QYZDB-SSW-SYS013] ; Chinese Academy of Sciences [QYZDB-SSW-SYS013] ; Thousand Talents Plan for Young Professionals ; Thousand Talents Plan for Young Professionals ; Spanish Ministerio de Economia y Competitividad ; Spanish Ministerio de Economia y Competitividad ; European FEDER funds [FIS2011-28853-C02-01] ; European FEDER funds [FIS2011-28853-C02-01] ; Generalitat Valenciana in the program Prometeo II [2014/068] ; Generalitat Valenciana in the program Prometeo II [2014/068] ; Spanish Excellence Network on Hadronic Physics [FIS2014-57026-REDT] ; Spanish Excellence Network on Hadronic Physics [FIS2014-57026-REDT] ; DFG ; DFG ; NSFC [CRC 110, 11621131001] ; NSFC [CRC 110, 11621131001] ; Chinese Academy of Sciences [QYZDB-SSW-SYS013] ; Chinese Academy of Sciences [QYZDB-SSW-SYS013] ; Thousand Talents Plan for Young Professionals ; Thousand Talents Plan for Young Professionals
DOIhttp://dx.doi.org/10.1103/PhysRevD.94.074039
收录类别SCI
语种英语
资助者Spanish Ministerio de Economia y Competitividad ; Spanish Ministerio de Economia y Competitividad ; European FEDER funds [FIS2011-28853-C02-01] ; European FEDER funds [FIS2011-28853-C02-01] ; Generalitat Valenciana in the program Prometeo II [2014/068] ; Generalitat Valenciana in the program Prometeo II [2014/068] ; Spanish Excellence Network on Hadronic Physics [FIS2014-57026-REDT] ; Spanish Excellence Network on Hadronic Physics [FIS2014-57026-REDT] ; DFG ; DFG ; NSFC [CRC 110, 11621131001] ; NSFC [CRC 110, 11621131001] ; Chinese Academy of Sciences [QYZDB-SSW-SYS013] ; Chinese Academy of Sciences [QYZDB-SSW-SYS013] ; Thousand Talents Plan for Young Professionals ; Thousand Talents Plan for Young Professionals ; Spanish Ministerio de Economia y Competitividad ; Spanish Ministerio de Economia y Competitividad ; European FEDER funds [FIS2011-28853-C02-01] ; European FEDER funds [FIS2011-28853-C02-01] ; Generalitat Valenciana in the program Prometeo II [2014/068] ; Generalitat Valenciana in the program Prometeo II [2014/068] ; Spanish Excellence Network on Hadronic Physics [FIS2014-57026-REDT] ; Spanish Excellence Network on Hadronic Physics [FIS2014-57026-REDT] ; DFG ; DFG ; NSFC [CRC 110, 11621131001] ; NSFC [CRC 110, 11621131001] ; Chinese Academy of Sciences [QYZDB-SSW-SYS013] ; Chinese Academy of Sciences [QYZDB-SSW-SYS013] ; Thousand Talents Plan for Young Professionals ; Thousand Talents Plan for Young Professionals
WOS类目Astronomy & Astrophysics ; Physics, Particles & Fields
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文献类型期刊论文
条目标识符http://ir.itp.ac.cn/handle/311006/21497
专题理论物理所2016年知识产出
通讯作者Bayar, M (reprint author), Kocaeli Univ, Dept Phys, TR-41380 Izmit, Turkey.; Bayar, M (reprint author), Univ Valencia, Inst Invest Paterna, Dept Fis Teor, Ctr Mixto,CSIC, Apartado 22085, Valencia 46071, Spain.; Bayar, M (reprint author), Univ Valencia, Inst Invest Paterna, IFIC, Ctr Mixto,CSIC, Apartado 22085, Valencia 46071, Spain.
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Bayar, M,Aceti, F,Guo, FK,et al. Discussion on triangle singularities in the Lambda(b) -> J/psi K(-)p reaction[J]. PHYSICAL REVIEW D,2016,94(7):74039.
APA Bayar, M.,Aceti, F.,Guo, FK.,Oset, E.,Bayar, M .,...&Bayar, M .(2016).Discussion on triangle singularities in the Lambda(b) -> J/psi K(-)p reaction.PHYSICAL REVIEW D,94(7),74039.
MLA Bayar, M,et al."Discussion on triangle singularities in the Lambda(b) -> J/psi K(-)p reaction".PHYSICAL REVIEW D 94.7(2016):74039.
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