Flavor structure of anomaly-free hidden photon models
Flavor structure of anomaly-free hidden photon models
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DOI：
10.1103/physrevd.103.075024
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发表时间：
2020-11
期刊：
影响因子：
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通讯作者：
M. Bauer;P. Foldenauer;Martin Mosny
中科院分区：
文献类型：
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作者：
M. Bauer;P. Foldenauer;Martin Mosny
标准模型的阿贝尔规范群的扩展受到规范反常相消的限制，因此在不引入新的手征费米子的情况下，只允许有限数量的可能电荷分配。对于味普适荷，关联的隐光子与标准模型费米子的耦合在树水平上是味守恒的。我们明确地表明，即使味道特定的电荷分配允许的异常取消条件导致味道保存树级耦合的隐藏的光子夸克和带电轻子\{如果}的CKM或PMNS矩阵可以成功地重建。此外，环诱导的风味变化偶联被强烈抑制。因此，Majorana质量矩阵的结构受到约束，隐光子与中微子质量本征态的变味树级耦合被认为是区分U（1）B-L规范玻色子与标准模型的任何其他无反常扩展的手段，而没有新的手征费米子。本文对U（1）_{B-3L_i}规范玻色子的约束条件和未来研究的前景进行了全面的分析，计算了U（1）_{B-3L_i}规范玻色子共振研究的范围，并对非标准中微子相互作用的意义进行了评述。
Extensions of the Standard Model with an abelian gauge group are constrained by gauge anomaly cancellation, so that only a limited number of possible charge assignments is allowed without the introduction of new chiral fermions. For flavour universal charges, couplings of the associated hidden photon to Standard Model fermions are flavour conserving at tree-level. We show explicitly that even the flavour specific charge assignments allowed by anomaly cancellation condition lead to flavour conserving tree-level couplings of the hidden photon to quarks and charged leptons \emph{if} the CKM or PMNS matrix can be successfully reconstructed. Further, loop-induced flavour changing couplings are strongly suppressed. As a consequence, the structure of the Majorana mass matrix is constrained and flavour changing tree-level couplings of the hidden photon to neutrino mass eigenstates are identified as a means to distinguish the $U(1)_{B-L}$ gauge boson from any other anomaly-free extension of the Standard Model without new chiral fermions. We present a comprehensive analysis of constraints and projections for future searches for a $U(1)_{B-3L_i}$ gauge boson, calculate the reach of resonance searches in $B$ meson decays and comment on the implications for non-standard neutrino interactions.