{"title":"探索$B→πK$衰变的新物理学","authors":"R. Fleischer, R. Jaarsma, E. Malami, K. Vos","doi":"10.22323/1.321.0176","DOIUrl":null,"url":null,"abstract":"Over the last two decades the $B \\to \\pi K$ decays have received a lot of attention. They are particularly interesting since the main contribution to these decays comes from QCD penguin topologies. Furthermore, electroweak penguin amplitudes give a contribution comparable to the tree topologies. In the past, a discrepancy was found in the correlation between the CP asymmetries of $B_d^0 \\to \\pi^0 K_{\\rm S}$. We give an up-to-date picture of this situation and consider new constraints, finding that the effect has become larger. An attractive explanation is offered by a modified electroweak penguin sector. We employ an isospin relation between the amplitudes of the $B \\to \\pi K$ decays to determine the relevant parameters, making only minimal use of the $SU(3)$ flavour symmetry. Another essential constraint is provided by the mixing-induced CP asymmetry of $B_d^0 \\to \\pi^0 K_{\\rm S}$. The application of our strategy at the next generation of $B$-physics experiments may establish New Physics and reveal new sources of CP violation in the electroweak penguin sector.","PeriodicalId":346295,"journal":{"name":"Proceedings of Sixth Annual Conference on Large Hadron Collider Physics — PoS(LHCP2018)","volume":"357 1","pages":"0"},"PeriodicalIF":0.0000,"publicationDate":"2018-09-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"1","resultStr":"{\"title\":\"Probing New Physics in $B → πK$ Decays\",\"authors\":\"R. Fleischer, R. Jaarsma, E. Malami, K. Vos\",\"doi\":\"10.22323/1.321.0176\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"Over the last two decades the $B \\\\to \\\\pi K$ decays have received a lot of attention. They are particularly interesting since the main contribution to these decays comes from QCD penguin topologies. Furthermore, electroweak penguin amplitudes give a contribution comparable to the tree topologies. In the past, a discrepancy was found in the correlation between the CP asymmetries of $B_d^0 \\\\to \\\\pi^0 K_{\\\\rm S}$. We give an up-to-date picture of this situation and consider new constraints, finding that the effect has become larger. An attractive explanation is offered by a modified electroweak penguin sector. We employ an isospin relation between the amplitudes of the $B \\\\to \\\\pi K$ decays to determine the relevant parameters, making only minimal use of the $SU(3)$ flavour symmetry. Another essential constraint is provided by the mixing-induced CP asymmetry of $B_d^0 \\\\to \\\\pi^0 K_{\\\\rm S}$. The application of our strategy at the next generation of $B$-physics experiments may establish New Physics and reveal new sources of CP violation in the electroweak penguin sector.\",\"PeriodicalId\":346295,\"journal\":{\"name\":\"Proceedings of Sixth Annual Conference on Large Hadron Collider Physics — PoS(LHCP2018)\",\"volume\":\"357 1\",\"pages\":\"0\"},\"PeriodicalIF\":0.0000,\"publicationDate\":\"2018-09-04\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"1\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Proceedings of Sixth Annual Conference on Large Hadron Collider Physics — PoS(LHCP2018)\",\"FirstCategoryId\":\"1085\",\"ListUrlMain\":\"https://doi.org/10.22323/1.321.0176\",\"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 Sixth Annual Conference on Large Hadron Collider Physics — PoS(LHCP2018)","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.22323/1.321.0176","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
Over the last two decades the $B \to \pi K$ decays have received a lot of attention. They are particularly interesting since the main contribution to these decays comes from QCD penguin topologies. Furthermore, electroweak penguin amplitudes give a contribution comparable to the tree topologies. In the past, a discrepancy was found in the correlation between the CP asymmetries of $B_d^0 \to \pi^0 K_{\rm S}$. We give an up-to-date picture of this situation and consider new constraints, finding that the effect has become larger. An attractive explanation is offered by a modified electroweak penguin sector. We employ an isospin relation between the amplitudes of the $B \to \pi K$ decays to determine the relevant parameters, making only minimal use of the $SU(3)$ flavour symmetry. Another essential constraint is provided by the mixing-induced CP asymmetry of $B_d^0 \to \pi^0 K_{\rm S}$. The application of our strategy at the next generation of $B$-physics experiments may establish New Physics and reveal new sources of CP violation in the electroweak penguin sector.