You are here:
| Reference : Anomalous pion decay in effective QCD at finite temperature |
| Scientific journals : Article | |||
| Physical, chemical, mathematical & earth Sciences : Physics | |||
| http://hdl.handle.net/2268/23453 | |||
| Anomalous pion decay in effective QCD at finite temperature | |
| English | |
| Blaschke, David [ > > ] | |
Jaminon, Martine  [Université de Liège - ULg > Département d'astrophys., géophysique et océanographie (AGO) > Département d'astrophys., géophysique et océanographie (AGO) >] | |
| Kalinovsky, Yu. L. [ > > ] | |
| Petrow, P. [ > > ] | |
| Schmidt, S. [ > > ] | |
| Van den Bossche, Bruno [ > > ] | |
| 1995 | |
| Nuclear Physics A | |
| Elsevier Science | |
| 592 | |
| 561-580 | |
| International | |
| 0375-9474 | |
| Amsterdam | |
| The Netherlands | |
| [en] The width of the process π0 → γγ is calculated within effective QCD at finite temperature. We use two different effective models which describe chiral symmetry breaking and its restoration at finite temperature in SU(2)ƒ: (i) an effective lagrangian with a nonlocal separable interaction kernel, (ii) A- and B-scaledNJL lagrangians which implement the scale anomaly of QCD. We calculate the temperature dependences of the quark and pion masses as well as of the pion-park-antiquark coupling strength below and above the double quark mass threshold. At zero temperature we obtain a fairly good agreement with the experimental value for the decay width. The temperature dependence of the decay width is related to that of the pion mass. Γπ0 → γγ is enhanced in the vicinity of the Mott temperature (Mπ = 2mq) for the nonlocal as well as for the A-scaled model and suppressed for the B-scaled model. We compare our results with the SU(2) Nambu-Jona-Lasinio model which is contained as a limiting case in our approach. | |
| Researchers | |
| http://hdl.handle.net/2268/23453 | |
| 10.1016/0375-9474(95)00304-J |
There is no file associated with this reference.
All documents in ORBi are protected by a user license.
