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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.
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| Discussion on triangle singularities in the Lambda(b) -> J/psi K(-)p reaction | |
| Source Publication | PHYSICAL REVIEW D
 |
| Language | 英语 |
| Abstract | 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. |
| 2016 | |
| Volume | 94Issue:7Pages:74039 |
| Subject Area | Astronomy & Astrophysics ; Physics |
| DOI | http://dx.doi.org/10.1103/PhysRevD.94.074039 |
| Indexed By | SCI |
| Funding Organization | Spanish Ministerio de Economia y Competitividad ; Spanish Ministerio de Economia y Competitividad ; 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] ; 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] ; 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] ; Spanish Excellence Network on Hadronic Physics [FIS2014-57026-REDT] ; Spanish Excellence Network on Hadronic Physics [FIS2014-57026-REDT] ; DFG ; DFG ; DFG ; DFG ; NSFC [CRC 110, 11621131001] ; NSFC [CRC 110, 11621131001] ; NSFC [CRC 110, 11621131001] ; NSFC [CRC 110, 11621131001] ; Chinese Academy of Sciences [QYZDB-SSW-SYS013] ; Chinese Academy of Sciences [QYZDB-SSW-SYS013] ; 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 ; Thousand Talents Plan for Young Professionals ; Thousand Talents Plan for Young Professionals |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://ir.itp.ac.cn/handle/311006/21497 |
| Collection | SCI期刊论文 |
| Corresponding Author | 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. |
| Recommended Citation GB/T 7714 | 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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