科研之友
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摘要
At the LHC, dileptonic events may turn up new physics interacting with quarks and leptons. The poster child for this scenario is a resonant Z', much anticipated in l(+)l(-)invariant mass spectra. However, angular spectra of dileptons may play an equal or stronger role in discovering a nonresonant species. This paper avails their LHC measurements to corner the couplings and masses of leptoquarks (LQs) that can mediate qq -> l(+)l(-) in the t channel and dramatically alter Standard Model (SM) angular spectra. Also derived are constraints from alterations to m(ll) distributions. These dilepton probes exploiting the high rates and small uncertainties of the Drell-Yan process, rival or outdo dedicated LHC searches for LQs in single and pair production modes. The couplings of LQs with electronic interactions are best bound today by low-energy measurements of atomic parity violation, but can be probed better by l(+)l(-)measurements in the high luminosity runs of the LHC, with the angular spectra leading the way. This work also urges the experimental presentation of boost-invariant angular asymmetries that vanish in the SM.
- 出版日期2017-1-17
