Stringent dilepton bounds on left-right models using LHC data

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• 作者：Sudhanwa Patra^a ; ^b ; ^{sudhanwa@mpi-hd.mpg.de" class="auth_mail" title="E-mail the corresponding author} ; Farinaldo S. Queiroz^a ; ^{queiroz@mpi-hd.mpg.de" class="auth_mail" title="E-mail the corresponding author} ; Werner Rodejohann^a ; ^{werner.rodejohann@mpi-hd.mpg.de" class="auth_mail" title="E-mail the corresponding author}
• 刊名：Physics Letters B
• 出版年：2016
• 出版时间：10 January 2016
• 年：2016
• 卷：752
• 期：Complete
• 页码：186-190
• 全文大小：389 K

文摘

In canonical left-right symmetric models the lower mass bounds on the charged gauge bosons are in the ballpark of 3–4 TeV, resulting in much stronger limits on the neutral gauge boson 5186d6ffae3b6d0315ebd" title="Click to view the MathML source">Z_R$Z_R$, making its production unreachable at the LHC. However, if one evokes different patterns of left-right symmetry breaking the 5186d6ffae3b6d0315ebd" title="Click to view the MathML source">Z_R$Z_R$ might be lighter than the $W_R^{\pm }$ motivating an independent 5186d6ffae3b6d0315ebd" title="Click to view the MathML source">Z_R$Z_R$ collider study. In this work, we use the 8 TeV ATLAS 20.3 fb⁻¹$20.3{\text{fb}}^{-1}$ luminosity data to derive robust bounds on the 5186d6ffae3b6d0315ebd" title="Click to view the MathML source">Z_R$Z_R$ mass using dilepton data. We find strong lower bounds on the 5186d6ffae3b6d0315ebd" title="Click to view the MathML source">Z_R$Z_R$ mass for different right-handed gauge couplings, excluding 5186d6ffae3b6d0315ebd" title="Click to view the MathML source">Z_R$Z_R$ masses up to ∼3.2 TeV$\sim 3.2\text{TeV}$. For the canonical LR model we place a lower mass bound of ∼2.5 TeV$\sim 2.5\text{TeV}$. Our findings are almost independent of the right-handed neutrino masses (∼2%$\sim 2\text{\%}$ effect) and applicable to general left-right models.