New physics effects of the vector leptoquark on $${\bar{B}}^{*}\rightarrow P\tau {\bar{\nu }}_{\tau }$$ B¯∗→Pτν¯τ decays
Abstract Motivated by the $$R_{\mathrm{D}^{(*)}}$$ RD(∗) anomalies which may imply hints of New Physics in the flavor sector and which can be explained by adding a single vector leptoquark $$ U_{3}(3,3,2/3)$$ U3(3,3,2/3) to the Standard Model as well as by the abundant $$B^{*}$$ B∗ data samples at h...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
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SpringerOpen
2019-02-01
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| Series: | European Physical Journal C: Particles and Fields |
| Online Access: | http://link.springer.com/article/10.1140/epjc/s10052-019-6648-0 |
| _version_ | 1818194379802673152 |
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| author | Jiao Zhang Yongsheng Zhang Qingguo Zeng Ruirui Sun |
| author_facet | Jiao Zhang Yongsheng Zhang Qingguo Zeng Ruirui Sun |
| author_sort | Jiao Zhang |
| collection | DOAJ |
| description | Abstract Motivated by the $$R_{\mathrm{D}^{(*)}}$$ RD(∗) anomalies which may imply hints of New Physics in the flavor sector and which can be explained by adding a single vector leptoquark $$ U_{3}(3,3,2/3)$$ U3(3,3,2/3) to the Standard Model as well as by the abundant $$B^{*}$$ B∗ data samples at high-luminosity collider experiments in the future, we further probe the New Physics effects of the vector leptoquark in the semileptonic $${\bar{B}}^{*}_\mathrm{d,s}\rightarrow P \tau {\bar{\nu }}_{\tau }(P=D,D_\mathrm{s},\pi ,K)$$ B¯d,s∗→Pτν¯τ(P=D,Ds,π,K) decays which are induced by the transitions $$b\rightarrow (u,c)\tau {\bar{\nu }}_{\tau }$$ b→(u,c)τν¯τ at the quark level. We investigate the New Physics leptoquark effects in the observables including the differential branching fractions and their ratios, lepton forward–backward asymmetry and lepton polarization asymmetry. We find the contributions of the vector leptoquark to the differential branching fractions and their ratios to be significant, and they show large deviations from the corresponding Standard Model predictions, while the lepton forward–backward asymmetry and the lepton polarization asymmetry in the leptoquark scenario show the same behaviors as that in the Standard Model. |
| first_indexed | 2024-12-12T01:01:22Z |
| format | Article |
| id | doaj.art-af36ee414fd94b698cf09dc181609f67 |
| institution | Directory Open Access Journal |
| issn | 1434-6044 1434-6052 |
| language | English |
| last_indexed | 2024-12-12T01:01:22Z |
| publishDate | 2019-02-01 |
| publisher | SpringerOpen |
| record_format | Article |
| series | European Physical Journal C: Particles and Fields |
| spelling | doaj.art-af36ee414fd94b698cf09dc181609f672022-12-22T00:43:43ZengSpringerOpenEuropean Physical Journal C: Particles and Fields1434-60441434-60522019-02-017921810.1140/epjc/s10052-019-6648-0New physics effects of the vector leptoquark on $${\bar{B}}^{*}\rightarrow P\tau {\bar{\nu }}_{\tau }$$ B¯∗→Pτν¯τ decaysJiao Zhang0Yongsheng Zhang1Qingguo Zeng2Ruirui Sun3Department of Mathematics and Physics, Luoyang Institute of Science and TechnologyDepartment of Mathematics and Physics, Luoyang Institute of Science and TechnologyDepartment of Physics, Shangqiu Normal UniversityDepartment of Mathematics and Physics, Luoyang Institute of Science and TechnologyAbstract Motivated by the $$R_{\mathrm{D}^{(*)}}$$ RD(∗) anomalies which may imply hints of New Physics in the flavor sector and which can be explained by adding a single vector leptoquark $$ U_{3}(3,3,2/3)$$ U3(3,3,2/3) to the Standard Model as well as by the abundant $$B^{*}$$ B∗ data samples at high-luminosity collider experiments in the future, we further probe the New Physics effects of the vector leptoquark in the semileptonic $${\bar{B}}^{*}_\mathrm{d,s}\rightarrow P \tau {\bar{\nu }}_{\tau }(P=D,D_\mathrm{s},\pi ,K)$$ B¯d,s∗→Pτν¯τ(P=D,Ds,π,K) decays which are induced by the transitions $$b\rightarrow (u,c)\tau {\bar{\nu }}_{\tau }$$ b→(u,c)τν¯τ at the quark level. We investigate the New Physics leptoquark effects in the observables including the differential branching fractions and their ratios, lepton forward–backward asymmetry and lepton polarization asymmetry. We find the contributions of the vector leptoquark to the differential branching fractions and their ratios to be significant, and they show large deviations from the corresponding Standard Model predictions, while the lepton forward–backward asymmetry and the lepton polarization asymmetry in the leptoquark scenario show the same behaviors as that in the Standard Model.http://link.springer.com/article/10.1140/epjc/s10052-019-6648-0 |
| spellingShingle | Jiao Zhang Yongsheng Zhang Qingguo Zeng Ruirui Sun New physics effects of the vector leptoquark on $${\bar{B}}^{*}\rightarrow P\tau {\bar{\nu }}_{\tau }$$ B¯∗→Pτν¯τ decays European Physical Journal C: Particles and Fields |
| title | New physics effects of the vector leptoquark on $${\bar{B}}^{*}\rightarrow P\tau {\bar{\nu }}_{\tau }$$ B¯∗→Pτν¯τ decays |
| title_full | New physics effects of the vector leptoquark on $${\bar{B}}^{*}\rightarrow P\tau {\bar{\nu }}_{\tau }$$ B¯∗→Pτν¯τ decays |
| title_fullStr | New physics effects of the vector leptoquark on $${\bar{B}}^{*}\rightarrow P\tau {\bar{\nu }}_{\tau }$$ B¯∗→Pτν¯τ decays |
| title_full_unstemmed | New physics effects of the vector leptoquark on $${\bar{B}}^{*}\rightarrow P\tau {\bar{\nu }}_{\tau }$$ B¯∗→Pτν¯τ decays |
| title_short | New physics effects of the vector leptoquark on $${\bar{B}}^{*}\rightarrow P\tau {\bar{\nu }}_{\tau }$$ B¯∗→Pτν¯τ decays |
| title_sort | new physics effects of the vector leptoquark on bar b rightarrow p tau bar nu tau b¯∗ pτν¯τ decays |
| url | http://link.springer.com/article/10.1140/epjc/s10052-019-6648-0 |
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