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arXiv 1303.4332hep-phhep-exnucl-th
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τ中微子作为非标准相互作用的探针

Tau neutrino as a probe of nonstandard interaction

Ahmed Rashed, Preet Sharma, Alakabha Datta

摘要:

研究了在带电Higgs粒子和$W'$规范玻色子存在下,τ中微子核子散射$ν_τ+ N \to τ^- + X$和$\barν_τ+ N \to τ^+ + X$中的$Δ$共振和深度非弹性散射贡献.新的物理效应对准弹性过程的影响已在以前的工作中讨论过。大气混合角$θ_{23}$的提取依赖于$ν_τ$出现实验中$ν_τ+ N \to τ^- + X$的标准模型截面。对带电希格斯粒子和$W'$贡献的横截面的修正修改了测量的混合角。我们在新的物理计算中包括形状因子效应,并找到混合角的偏差。如果设计高能长基线实验来通过τ中微子的出现测量$θ_{13}$,则对$ν_τ+ N \to τ^- + X$和$\barν_τ+ N \to τ^+ + X$的新物理效应会影响该混合角的提取。最后,我们研究了在$ν_τ(\barν_τ)$核子散射中产生的$τ^\mp$轻子极化的新物理效应。

英文摘要:

We study the $Δ$-resonance and deep inelastic scattering contributions in the tau-neutrino nucleon scattering $ν_τ+ N \to τ^- + X$ and $\barν_τ+ N \to τ^+ + X$ in the presence of a charged Higgs and a $W'$ gauge boson. The new physics effects to the quasielastic process have been discussed in a previous work. The extractions of the atmospheric mixing angle $θ_{23}$ rely on the standard model cross sections for $ν_τ+ N \to τ^- + X$ in $ν_τ$ appearance experiments. Corrections to the cross sections from the charged Higgs and $W'$ contributions modify the measured mixing angle. We include form factor effects in the new physics calculations and find the deviations of the mixing angle. If high-energy Long Base Line experiments are designed to measure $θ_{13}$ through tau neutrino appearance, the new physics effects to $ν_τ+ N \to τ^- + X$ and $\barν_τ+ N \to τ^+ + X$ can impact the extraction of this mixing angle. Finally, we investigate the new physics effects on the polarization of the $τ^\mp$ leptons produced in $ν_τ(\barν_τ)$ nucleon scattering.

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