{"title":"Dark photon effect on the rare kaon decay \n KL⃗π0νν¯","authors":"Xuan Wang, A. Thomas","doi":"10.1088/1361-6471/acdfed","DOIUrl":null,"url":null,"abstract":"\n <jats:p>We present an analysis of the effect of a dark photon on the rare kaon decay <jats:inline-formula>\n <jats:tex-math>\n<?CDATA ${K}_{L}\\to {\\pi }^{0}\\nu \\bar{\\nu }$?>\n</jats:tex-math>\n <mml:math xmlns:mml=\"http://www.w3.org/1998/Math/MathML\" overflow=\"scroll\">\n <mml:msub>\n <mml:mrow>\n <mml:mi>K</mml:mi>\n </mml:mrow>\n <mml:mrow>\n <mml:mi>L</mml:mi>\n </mml:mrow>\n </mml:msub>\n <mml:mo>→</mml:mo>\n <mml:msup>\n <mml:mrow>\n <mml:mi>π</mml:mi>\n </mml:mrow>\n <mml:mrow>\n <mml:mn>0</mml:mn>\n </mml:mrow>\n </mml:msup>\n <mml:mi>ν</mml:mi>\n <mml:mover accent=\"true\">\n <mml:mrow>\n <mml:mi>ν</mml:mi>\n </mml:mrow>\n <mml:mrow>\n <mml:mo>¯</mml:mo>\n </mml:mrow>\n </mml:mover>\n </mml:math>\n <jats:inline-graphic xmlns:xlink=\"http://www.w3.org/1999/xlink\" xlink:href=\"jpgacdfedieqn3.gif\" xlink:type=\"simple\" />\n </jats:inline-formula>. All relevant couplings of the dark photon to the standard model particles are derived explicitly in terms of the dark photon mass and the mixing parameter. We find that the dark photon yields no more than a few percent correction to the standard model branching ratio <jats:inline-formula>\n <jats:tex-math>\n<?CDATA $\\mathrm{Br}({K}_{L}\\to {\\pi }^{0}\\nu \\bar{\\nu })$?>\n</jats:tex-math>\n <mml:math xmlns:mml=\"http://www.w3.org/1998/Math/MathML\" overflow=\"scroll\">\n <mml:mi>Br</mml:mi>\n <mml:mo stretchy=\"false\">(</mml:mo>\n <mml:msub>\n <mml:mrow>\n <mml:mi>K</mml:mi>\n </mml:mrow>\n <mml:mrow>\n <mml:mi>L</mml:mi>\n </mml:mrow>\n </mml:msub>\n <mml:mo>→</mml:mo>\n <mml:msup>\n <mml:mrow>\n <mml:mi>π</mml:mi>\n </mml:mrow>\n <mml:mrow>\n <mml:mn>0</mml:mn>\n </mml:mrow>\n </mml:msup>\n <mml:mi>ν</mml:mi>\n <mml:mover accent=\"true\">\n <mml:mrow>\n <mml:mi>ν</mml:mi>\n </mml:mrow>\n <mml:mrow>\n <mml:mo>¯</mml:mo>\n </mml:mrow>\n </mml:mover>\n <mml:mo stretchy=\"false\">)</mml:mo>\n </mml:math>\n <jats:inline-graphic xmlns:xlink=\"http://www.w3.org/1999/xlink\" xlink:href=\"jpgacdfedieqn4.gif\" xlink:type=\"simple\" />\n </jats:inline-formula> in the region of interest.</jats:p>","PeriodicalId":16766,"journal":{"name":"Journal of Physics G: Nuclear and Particle Physics","volume":" ","pages":""},"PeriodicalIF":3.4000,"publicationDate":"2023-07-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"1","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Journal of Physics G: Nuclear and Particle Physics","FirstCategoryId":"101","ListUrlMain":"https://doi.org/10.1088/1361-6471/acdfed","RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"PHYSICS, NUCLEAR","Score":null,"Total":0}
引用次数: 1
Abstract
We present an analysis of the effect of a dark photon on the rare kaon decay KL→π0νν¯. All relevant couplings of the dark photon to the standard model particles are derived explicitly in terms of the dark photon mass and the mixing parameter. We find that the dark photon yields no more than a few percent correction to the standard model branching ratio Br(KL→π0νν¯) in the region of interest.
期刊介绍：
Journal of Physics G: Nuclear and Particle Physics (JPhysG) publishes articles on theoretical and experimental topics in all areas of nuclear and particle physics, including nuclear and particle astrophysics. The journal welcomes submissions from any interface area between these fields.
All aspects of fundamental nuclear physics research, including:
nuclear forces and few-body systems;
nuclear structure and nuclear reactions;
rare decays and fundamental symmetries;
hadronic physics, lattice QCD;
heavy-ion physics;
hot and dense matter, QCD phase diagram.
All aspects of elementary particle physics research, including:
high-energy particle physics;
neutrino physics;
phenomenology and theory;
beyond standard model physics;
electroweak interactions;
fundamental symmetries.
All aspects of nuclear and particle astrophysics including:
nuclear physics of stars and stellar explosions;
nucleosynthesis;
nuclear equation of state;
astrophysical neutrino physics;
cosmic rays;
dark matter.
JPhysG publishes a variety of article types for the community. As well as high-quality research papers, this includes our prestigious topical review series, focus issues, and the rapid publication of letters.
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