New signature of low mass Z′ in J/ψ decays* * Supported in part by the National Key Research and Development Program of China under (2020YFC2201501) and the National Natural Science Foundation of China (NSFC) (12347103, 12205063)
{"title":"New signature of low mass Z′ in J/ψ decays* * Supported in part by the National Key Research and Development Program of China under (2020YFC2201501) and the National Natural Science Foundation of China (NSFC) (12347103, 12205063)","authors":"Chao-Qiang Geng, Chia-Wei Liu, Jiabao Zhang","doi":"10.1088/1674-1137/ad53b6","DOIUrl":null,"url":null,"abstract":"We explored a new approach to search for a low-mass <inline-formula>\n<tex-math><?CDATA $ Z^{\\prime} $?></tex-math>\n<inline-graphic xlink:href=\"cpc_48_8_081001_M3.jpg\" xlink:type=\"simple\"></inline-graphic>\n</inline-formula> particle through <inline-formula>\n<tex-math><?CDATA $ J/\\psi $?></tex-math>\n<inline-graphic xlink:href=\"cpc_48_8_081001_M4.jpg\" xlink:type=\"simple\"></inline-graphic>\n</inline-formula> decays by identifying its existence through parity-violating phenomena in the isospin-violating final states of <inline-formula>\n<tex-math><?CDATA $ \\Lambda\\overline{\\Sigma}^{0} $?></tex-math>\n<inline-graphic xlink:href=\"cpc_48_8_081001_M5.jpg\" xlink:type=\"simple\"></inline-graphic>\n</inline-formula> and the corresponding charge conjugated states of <inline-formula>\n<tex-math><?CDATA $ \\overline{\\Lambda}\\Sigma^{0} $?></tex-math>\n<inline-graphic xlink:href=\"cpc_48_8_081001_M6.jpg\" xlink:type=\"simple\"></inline-graphic>\n</inline-formula>. Our investigation centered on a generation-independent and leptophobic <inline-formula>\n<tex-math><?CDATA $ Z^{\\prime} $?></tex-math>\n<inline-graphic xlink:href=\"cpc_48_8_081001_M7.jpg\" xlink:type=\"simple\"></inline-graphic>\n</inline-formula> with mass below 10 GeV. Given the present experimental conditions at Beijing Spectrometer III (BESIII) and the anticipated opportunities at the Super Tau Charm Factory (STCF), we conducted Monte-Carlo simulations to predict possible events at both facilities. Notably, we foresee a substantial enhancement in the precision of the lower limit estimation of <inline-formula>\n<tex-math><?CDATA $ \\alpha_{\\text{NP}} $?></tex-math>\n<inline-graphic xlink:href=\"cpc_48_8_081001_M8.jpg\" xlink:type=\"simple\"></inline-graphic>\n</inline-formula> as well as a reduction in statistical uncertainty with upcoming STCF experiments. Furthermore, it is essential to highlight that a null result in the measurement of <inline-formula>\n<tex-math><?CDATA $ \\alpha_{\\text{NP}} $?></tex-math>\n<inline-graphic xlink:href=\"cpc_48_8_081001_M9.jpg\" xlink:type=\"simple\"></inline-graphic>\n</inline-formula> would impose stringent constraints, requiring the <inline-formula>\n<tex-math><?CDATA $ Z^{\\prime}-q-q $?></tex-math>\n<inline-graphic xlink:href=\"cpc_48_8_081001_M10.jpg\" xlink:type=\"simple\"></inline-graphic>\n</inline-formula> couplings to be in the order of <inline-formula>\n<tex-math><?CDATA $ 10^{-2} $?></tex-math>\n<inline-graphic xlink:href=\"cpc_48_8_081001_M11.jpg\" xlink:type=\"simple\"></inline-graphic>\n</inline-formula>.","PeriodicalId":10250,"journal":{"name":"中国物理C","volume":"50 1","pages":""},"PeriodicalIF":3.6000,"publicationDate":"2024-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"中国物理C","FirstCategoryId":"101","ListUrlMain":"https://doi.org/10.1088/1674-1137/ad53b6","RegionNum":2,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"PHYSICS, NUCLEAR","Score":null,"Total":0}
引用次数: 0
Abstract
We explored a new approach to search for a low-mass particle through decays by identifying its existence through parity-violating phenomena in the isospin-violating final states of and the corresponding charge conjugated states of . Our investigation centered on a generation-independent and leptophobic with mass below 10 GeV. Given the present experimental conditions at Beijing Spectrometer III (BESIII) and the anticipated opportunities at the Super Tau Charm Factory (STCF), we conducted Monte-Carlo simulations to predict possible events at both facilities. Notably, we foresee a substantial enhancement in the precision of the lower limit estimation of as well as a reduction in statistical uncertainty with upcoming STCF experiments. Furthermore, it is essential to highlight that a null result in the measurement of would impose stringent constraints, requiring the couplings to be in the order of .
期刊介绍：
Chinese Physics C covers the latest developments and achievements in the theory, experiment and applications of:
Particle physics;
Nuclear physics;
Particle and nuclear astrophysics;
Cosmology;
Accelerator physics.
The journal publishes original research papers, letters and reviews. The Letters section covers short reports on the latest important scientific results, published as quickly as possible. Such breakthrough research articles are a high priority for publication.
The Editorial Board is composed of about fifty distinguished physicists, who are responsible for the review of submitted papers and who ensure the scientific quality of the journal.
The journal has been awarded the Chinese Academy of Sciences ‘Excellent Journal’ award multiple times, and is recognized as one of China''s top one hundred key scientific periodicals by the General Administration of News and Publications.
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