{"title":"BESIII的重子/轻子数违反搜索","authors":"Teng Wang","doi":"10.22323/1.414.0702","DOIUrl":null,"url":null,"abstract":"Based on 2.93 fb − 1 of 𝑒 + 𝑒 − collision data taken at √ 𝑠 = 3 . 773 GeV and 1.31 × 10 9 𝐽 / 𝜓 events taken at √ 𝑠 = 3 . 097 GeV, we present the searches for baryon number and lepton number violation in 𝐷 0 → 𝑝𝑒 − ( ¯ 𝑝𝑒 + ) , 𝐷 + → ¯ Λ ( ¯ Σ 0 ) 𝑒 + , 𝐷 + → Λ ( Σ 0 ) 𝑒 + , 𝐷 ± → 𝑛 ( ¯ 𝑛 ) 𝑒 ± , 𝐽 / 𝜓 → Λ + 𝑐 𝑒 − + 𝑐.𝑐 , and 𝐽 / 𝜓 → 𝑝𝐾 − ¯ Λ + 𝑐.𝑐 decays. No obvious signals are found and the upper limits on the branching fractions of these decays are set to be ∼ 10 − 8 − 10 − 6 at 90% confidence level. Those results are the most stringent ones to date for these processes but are still far above the prediction of the higher generation model.","PeriodicalId":286451,"journal":{"name":"Proceedings of 41st International Conference on High Energy physics — PoS(ICHEP2022)","volume":"332 1","pages":"0"},"PeriodicalIF":0.0000,"publicationDate":"2022-12-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Baryon/Lepton number violation searches at BESIII\",\"authors\":\"Teng Wang\",\"doi\":\"10.22323/1.414.0702\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"Based on 2.93 fb − 1 of 𝑒 + 𝑒 − collision data taken at √ 𝑠 = 3 . 773 GeV and 1.31 × 10 9 𝐽 / 𝜓 events taken at √ 𝑠 = 3 . 097 GeV, we present the searches for baryon number and lepton number violation in 𝐷 0 → 𝑝𝑒 − ( ¯ 𝑝𝑒 + ) , 𝐷 + → ¯ Λ ( ¯ Σ 0 ) 𝑒 + , 𝐷 + → Λ ( Σ 0 ) 𝑒 + , 𝐷 ± → 𝑛 ( ¯ 𝑛 ) 𝑒 ± , 𝐽 / 𝜓 → Λ + 𝑐 𝑒 − + 𝑐.𝑐 , and 𝐽 / 𝜓 → 𝑝𝐾 − ¯ Λ + 𝑐.𝑐 decays. No obvious signals are found and the upper limits on the branching fractions of these decays are set to be ∼ 10 − 8 − 10 − 6 at 90% confidence level. Those results are the most stringent ones to date for these processes but are still far above the prediction of the higher generation model.\",\"PeriodicalId\":286451,\"journal\":{\"name\":\"Proceedings of 41st International Conference on High Energy physics — PoS(ICHEP2022)\",\"volume\":\"332 1\",\"pages\":\"0\"},\"PeriodicalIF\":0.0000,\"publicationDate\":\"2022-12-15\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Proceedings of 41st International Conference on High Energy physics — PoS(ICHEP2022)\",\"FirstCategoryId\":\"1085\",\"ListUrlMain\":\"https://doi.org/10.22323/1.414.0702\",\"RegionNum\":0,\"RegionCategory\":null,\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"\",\"JCRName\":\"\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Proceedings of 41st International Conference on High Energy physics — PoS(ICHEP2022)","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.22323/1.414.0702","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
Based on 2.93 fb − 1 of 𝑒 + 𝑒 − collision data taken at √ 𝑠 = 3 . 773 GeV and 1.31 × 10 9 𝐽 / 𝜓 events taken at √ 𝑠 = 3 . 097 GeV, we present the searches for baryon number and lepton number violation in 𝐷 0 → 𝑝𝑒 − ( ¯ 𝑝𝑒 + ) , 𝐷 + → ¯ Λ ( ¯ Σ 0 ) 𝑒 + , 𝐷 + → Λ ( Σ 0 ) 𝑒 + , 𝐷 ± → 𝑛 ( ¯ 𝑛 ) 𝑒 ± , 𝐽 / 𝜓 → Λ + 𝑐 𝑒 − + 𝑐.𝑐 , and 𝐽 / 𝜓 → 𝑝𝐾 − ¯ Λ + 𝑐.𝑐 decays. No obvious signals are found and the upper limits on the branching fractions of these decays are set to be ∼ 10 − 8 − 10 − 6 at 90% confidence level. Those results are the most stringent ones to date for these processes but are still far above the prediction of the higher generation model.
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