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We present a comment on the kinematic variable $m_{CT2}$ recently proposed in Amplification of endpoint structure for new particle mass measurement at the LHC. The variable is designed to be applied to models such as R-parity conserving Supersymmetry (SUSY) when there is pair production of new heavy particles each of which decays to a single massless visible and a massive invisible component. It was proposed in Amplification of endpoint structure for new particle mass measurement at the LHC that a measurement of the peak of the $m_{CT2}$ distribution could be used to precisely constrain the masses of the SUSY particles. We show that when Standard Model backgrounds are included in simulations, the sensitivity of the $m_{CT2}$ variable to the SUSY particle masses is more seriously impacted for $m_{CT2}$ than for other previously proposed variables.
We introduce a new collider variable, MCT2, named as constransverse mass. It is a mixture of `stransverse mass(MT2) and `contransverse mass(MCT) variables, where the usual endpoint structure of MT2 distribution can be amplified in the MCT2 basis by l
Invited News & Views for the journal, SCIENCE CHINA: Physics, Mechanics & Astronomy, on a recently new search for the doubly charmed baryon $Xi_{cc}^+$ at the LHC, which is done by the LHCb Collaboration, arXiv:1909.12273.
This note presents an analysis of the potential of future high-energy electron-positron colliders to measure the $b$-quark mass. We perform a full-simulation study of the measurement of the ratio of the three-jet rates in events with $bbar{b}(g)$ and
We argue that the concept of a multi-purpose fixed-target experiment with the proton or lead-ion LHC beams extracted by a bent crystal would offer a number of ground-breaking precision-physics opportunities. The multi-TeV LHC beams will allow for the
At LHC energies, the charged-particle multiplicity dependence of particle production is a topic of considerable interest in $pp$ collisions. It has been argued that multiple partonic interactions play an important role in particle production mechanis