论文标题
在LHEC探测$ z^\ prime $介导的充电Lepton风味违反Taus
Probing $Z^\prime$ Mediated Charged Lepton Flavor Violation with Taus at the LHeC
论文作者
论文摘要
尽管在标准型号的许多扩展中，通常预计带有TAU的充电Lepton侵犯（CLFV）通常是最大的，但目前，它的约束要比对电子和MUON的CLFV少得多。我们研究了LHEC对$ e $ - $τ$（和$ e $ - $ - $ - $ - $ $）的转换过程$ p e^ - \至τ^ - + j $（和$ p e^ - \ \ \ \ \ toμ^ - + j $），由$ z'$介导，由a $ z'$带有味道 - 弹性couplings the the $ t $ t $ t $ -channel。与LHC的当前测试相比，搜索了$ z'$（在S渠道中生产）的CLFV衰变，LHEC对更高的$ z'$ smoses具有敏感性，最高为o（10）tev。对于与Taus的CLFV，我们发现该过程的LHEC敏感性$ p e^ - \ \ toτ^ - + j $可以超过整个被视为$ z'$质量范围（超过500 $ GEV）的对撞机和非碰撞器实验的当前限制。特别是对于具有重型$ Z'$的SM扩展，在该$上，在船上的直接生产受到运动抑制，LHEC的$ E-E-τ$转换为这类新物理学提供了令人兴奋的新发现频道。
While charged lepton flavor violation (cLFV) with taus is often expected to be largest in many extensions of the Standard Model (SM), it is currently much less constrained than cLFV with electrons and muons. We study the sensitivity of the LHeC to $e$-$τ$ (and $e$-$μ$) conversion processes $p e^- \to τ^- + j$ (and $p e^- \to μ^- + j$) mediated by a $Z'$ with flavor-violating couplings to charged leptons in the $t$-channel. Compared to current tests at the LHC, where cLFV decays of the $Z'$ (produced in the s-channel) are searched for, the LHeC has sensitivity to much higher $Z'$ masses, up to O(10) TeV. For cLFV with taus, we find that the LHeC sensitivity from the process $p e^- \to τ^- + j$ can exceed the current limits from collider and non-collider experiments in the whole considered $Z'$ mass range (above $500$ GeV) by more than two orders of magnitude. In particular for extensions of the SM with a heavy $Z'$, where direct production at colliders is kinematically suppressed, $e-τ$ conversion at LHeC provides an exciting new discovery channel for this type of new physics.
