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meson with finite momentum in a dense mediumKim, H.-J.*; Gubler, P.
Physics Letters B, 805, p.135412_1 - 135412_8, 2020/06
被引用回数：15 パーセンタイル：83.34(Astronomy & Astrophysics)QCD和則を利用し、核物質におけるメソンの分散関係を調べる。敗れたLorentz対称性により、有限密度中ではベクター粒子のlongitudinal及びtransverseモードが異なる振る舞いを示しえる。次元6までの可能な演算子及びそのWilson係数をすべて用い、様々な密度及び運動量におけるメソンの分散関係を解析する。その結果、longitudinal及びtransverseモードが逆の振る舞いを示すことが分かった。実際、運動量1GeVでは、longitudinalモードでは質量が5MeVほど下り、transverseモードでは7MeVほど上がることが分かった。longitudinal及びtransverseモードを区別しない実験では、この現象が二つの分離されたピークとして観測される可能性がある。
Gubler, P.; Kim, H. J.*; Lee, S. H.*
no journal, ,
有限運動量を持つ核物質中のphiメソンの振る舞いについての最近の研究の進捗状況について報告する。J-PARCのE16実験との関連についても議論する。
Gubler, P.
no journal, ,
本講演の前半では核物質中でのカイラル対称性の部分的回復の現状を概観する。後半では自分がここ数年取り組んでいる核物質中のメソンの振る舞いに関する研究を紹介し、特にJ-PARCのE16実験との関連を議論する。
meson in nuclear matter; Interpreting the E325 data in a transport approachGubler, P.
no journal, ,
We present recent results of numerical simulations of the 12 GeV pA reactions probed at the KEK E325 experiment using a transport approach. Furthermore, we discuss how the simulation results can be used to interpret the experimental data in terms of the modification of the phi meson at finite density.
Gubler, P.
no journal, ,
We present recent results of numerical simulations of the 12 GeV pA reactions probed at the KEK E325 experiment using a transport approach. Furthermore, we discuss how the simulation results can be used to interpret the experimental data in terms of the modification of the phi meson at finite density. Finally, we will give an outlook to the presently ongoing J-PARC E16 experiment.
decaysGubler, P.
no journal, ,
While the meson vacuum properties, such as mass and width, are well known, it is not clear how these properties will change once it is put in a dense environment such as nuclear matter. Theoretically, many works have been conducted with the aim of studying the meson in nuclear matter. Connecting theoretical results with experimental measurements is, however, not a trivial task, as the meson in nuclear matter is usually produced in relatively high-energy pA reactions, which are generally non-equilibrium processes. In this presentation I will report on an ongoing project, attempting to simulate pA reactions in which the meson is produced in nuclei, making use of a transport approach. Results of simulations of 12 GeV/30 GeV p+C and p+Cu reactions will be presented and comparisons between obtained dilepton spectra and experimental data of the E325 experiment at KEK will be made.
