Nimra Farooq, Marwah Zaki, M. Ali Paracha, Faisal Munir Bhutta
{"title":"族非通用 Z ′模型对衰变角观测值的影响* * 由巴基斯坦高等教育委员会通过（NRPU/20-15142）提供支持","authors":"Nimra Farooq, Marwah Zaki, M. Ali Paracha, Faisal Munir Bhutta","doi":"10.1088/1674-1137/ad5e65","DOIUrl":null,"url":null,"abstract":"We present the angular distribution of the four-fold <inline-formula>\n<tex-math><?CDATA $ B\\to\\rho (\\to\\pi\\pi)\\mu^{+}\\mu^{-} $?></tex-math>\n<inline-graphic xlink:href=\"cpc_48_10_103107_M1.jpg\" xlink:type=\"simple\"></inline-graphic>\n</inline-formula> and <inline-formula>\n<tex-math><?CDATA $ B\\to a_{1}(\\to\\rho_{\\parallel, \\perp}\\pi)\\mu^{+}\\mu^{-} $?></tex-math>\n<inline-graphic xlink:href=\"cpc_48_10_103107_M2.jpg\" xlink:type=\"simple\"></inline-graphic>\n</inline-formula> decays in the Standard Model and family non-universal <inline-formula>\n<tex-math><?CDATA $ Z^{\\prime} $?></tex-math>\n<inline-graphic xlink:href=\"cpc_48_10_103107_M3.jpg\" xlink:type=\"simple\"></inline-graphic>\n</inline-formula> model. At the quark level, these decays are governed by the <inline-formula>\n<tex-math><?CDATA $ b\\to d\\mu^{+}\\mu^{-} $?></tex-math>\n<inline-graphic xlink:href=\"cpc_48_10_103107_M4.jpg\" xlink:type=\"simple\"></inline-graphic>\n</inline-formula> transition. Along with different angular observables, we provide predictions of differential branching ratios, forward-backward asymmetry, and longitudinal polarization fractions of <inline-formula>\n<tex-math><?CDATA $ \\rho $?></tex-math>\n<inline-graphic xlink:href=\"cpc_48_10_103107_M5.jpg\" xlink:type=\"simple\"></inline-graphic>\n</inline-formula> and <inline-formula>\n<tex-math><?CDATA $ a_{1} $?></tex-math>\n<inline-graphic xlink:href=\"cpc_48_10_103107_M6.jpg\" xlink:type=\"simple\"></inline-graphic>\n</inline-formula> mesons. Our analysis shows that the signatures of the family non-universal <inline-formula>\n<tex-math><?CDATA $ Z^{\\prime} $?></tex-math>\n<inline-graphic xlink:href=\"cpc_48_10_103107_M7.jpg\" xlink:type=\"simple\"></inline-graphic>\n</inline-formula> model are more distinct in the observables associated with the <inline-formula>\n<tex-math><?CDATA $ B\\to\\rho(\\to\\pi\\pi)\\mu^{+}\\mu^{-} $?></tex-math>\n<inline-graphic xlink:href=\"cpc_48_10_103107_M8.jpg\" xlink:type=\"simple\"></inline-graphic>\n</inline-formula> decay than in those associated with the <inline-formula>\n<tex-math><?CDATA $ B\\to a_{1}(\\to\\rho_{\\parallel, \\perp}\\pi)\\mu^{+}\\mu^{-} $?></tex-math>\n<inline-graphic xlink:href=\"cpc_48_10_103107_M9.jpg\" xlink:type=\"simple\"></inline-graphic>\n</inline-formula> decay. Future measurements of the predicted angular observables, both at current and future high energy colliders, will provide useful complementary data required to clarify the structure of the family non-universal <inline-formula>\n<tex-math><?CDATA $ Z^{\\prime} $?></tex-math>\n<inline-graphic xlink:href=\"cpc_48_10_103107_M10.jpg\" xlink:type=\"simple\"></inline-graphic>\n</inline-formula> model in <inline-formula>\n<tex-math><?CDATA $ |\\Delta b| $?></tex-math>\n<inline-graphic xlink:href=\"cpc_48_10_103107_M11.jpg\" xlink:type=\"simple\"></inline-graphic>\n</inline-formula>=<inline-formula>\n<tex-math><?CDATA $ |\\Delta d|=1 $?></tex-math>\n<inline-graphic xlink:href=\"cpc_48_10_103107_M12.jpg\" xlink:type=\"simple\"></inline-graphic>\n</inline-formula> processes.","PeriodicalId":10250,"journal":{"name":"中国物理C","volume":null,"pages":null},"PeriodicalIF":3.6000,"publicationDate":"2024-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Effects of family non-universal Z ′ model in angular observables of decays* * Supported by the Higher Education Commission of Pakistan through (NRPU/20-15142)\",\"authors\":\"Nimra Farooq, Marwah Zaki, M. Ali Paracha, Faisal Munir Bhutta\",\"doi\":\"10.1088/1674-1137/ad5e65\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"We present the angular distribution of the four-fold <inline-formula>\\n<tex-math><?CDATA $ B\\\\to\\\\rho (\\\\to\\\\pi\\\\pi)\\\\mu^{+}\\\\mu^{-} $?></tex-math>\\n<inline-graphic xlink:href=\\\"cpc_48_10_103107_M1.jpg\\\" xlink:type=\\\"simple\\\"></inline-graphic>\\n</inline-formula> and <inline-formula>\\n<tex-math><?CDATA $ B\\\\to a_{1}(\\\\to\\\\rho_{\\\\parallel, \\\\perp}\\\\pi)\\\\mu^{+}\\\\mu^{-} $?></tex-math>\\n<inline-graphic xlink:href=\\\"cpc_48_10_103107_M2.jpg\\\" xlink:type=\\\"simple\\\"></inline-graphic>\\n</inline-formula> decays in the Standard Model and family non-universal <inline-formula>\\n<tex-math><?CDATA $ Z^{\\\\prime} $?></tex-math>\\n<inline-graphic xlink:href=\\\"cpc_48_10_103107_M3.jpg\\\" xlink:type=\\\"simple\\\"></inline-graphic>\\n</inline-formula> model. At the quark level, these decays are governed by the <inline-formula>\\n<tex-math><?CDATA $ b\\\\to d\\\\mu^{+}\\\\mu^{-} $?></tex-math>\\n<inline-graphic xlink:href=\\\"cpc_48_10_103107_M4.jpg\\\" xlink:type=\\\"simple\\\"></inline-graphic>\\n</inline-formula> transition. Along with different angular observables, we provide predictions of differential branching ratios, forward-backward asymmetry, and longitudinal polarization fractions of <inline-formula>\\n<tex-math><?CDATA $ \\\\rho $?></tex-math>\\n<inline-graphic xlink:href=\\\"cpc_48_10_103107_M5.jpg\\\" xlink:type=\\\"simple\\\"></inline-graphic>\\n</inline-formula> and <inline-formula>\\n<tex-math><?CDATA $ a_{1} $?></tex-math>\\n<inline-graphic xlink:href=\\\"cpc_48_10_103107_M6.jpg\\\" xlink:type=\\\"simple\\\"></inline-graphic>\\n</inline-formula> mesons. Our analysis shows that the signatures of the family non-universal <inline-formula>\\n<tex-math><?CDATA $ Z^{\\\\prime} $?></tex-math>\\n<inline-graphic xlink:href=\\\"cpc_48_10_103107_M7.jpg\\\" xlink:type=\\\"simple\\\"></inline-graphic>\\n</inline-formula> model are more distinct in the observables associated with the <inline-formula>\\n<tex-math><?CDATA $ B\\\\to\\\\rho(\\\\to\\\\pi\\\\pi)\\\\mu^{+}\\\\mu^{-} $?></tex-math>\\n<inline-graphic xlink:href=\\\"cpc_48_10_103107_M8.jpg\\\" xlink:type=\\\"simple\\\"></inline-graphic>\\n</inline-formula> decay than in those associated with the <inline-formula>\\n<tex-math><?CDATA $ B\\\\to a_{1}(\\\\to\\\\rho_{\\\\parallel, \\\\perp}\\\\pi)\\\\mu^{+}\\\\mu^{-} $?></tex-math>\\n<inline-graphic xlink:href=\\\"cpc_48_10_103107_M9.jpg\\\" xlink:type=\\\"simple\\\"></inline-graphic>\\n</inline-formula> decay. 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Effects of family non-universal Z ′ model in angular observables of decays* * Supported by the Higher Education Commission of Pakistan through (NRPU/20-15142)
We present the angular distribution of the four-fold and decays in the Standard Model and family non-universal model. At the quark level, these decays are governed by the transition. Along with different angular observables, we provide predictions of differential branching ratios, forward-backward asymmetry, and longitudinal polarization fractions of and mesons. Our analysis shows that the signatures of the family non-universal model are more distinct in the observables associated with the decay than in those associated with the decay. Future measurements of the predicted angular observables, both at current and future high energy colliders, will provide useful complementary data required to clarify the structure of the family non-universal model in = processes.
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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