Kinematic edges of cascade decays of new particles produced in high-energy collisions may provide important constraints on the involved particles' masses. For the exemplary case of gluino decay $\tilde{g}\to q\bar q \tildeχ$ into a pair of quarks and a neutralino through a squark resonance, we study the hadronic invariant mass distribution in the vicinity of the kinematic edge. We perform a next-to-leading order calculation in the strong coupling $α_s$ and the ratio of squark width and squark mass $Γ_\tilde{q}/m_\tilde{q}$, based on a systematic expansion in $Γ_\tilde{q}/m_\tilde{q}$. The separation into hard, collinear and soft contributions elucidates the process dependent and universal features of distributions in the edge region, represented by on-shell decay matrix elements, universal jet functions and a soft function that depends on the resonance propagator and soft Wilson lines.
Interplay between final-state nucleon distortion, nuclear transparency and intranuclear cascade models in neutrino event generators
Universidad de Sevilla（塞维利亚大学）；University of Washington（华盛顿大学）；Kyoto University（京都大学）；École polytechnique, IN2P3-CNRS, Laboratoire Leprince-Ringuet（巴黎综合理工学院，法国国家科学研究中心IN2P3-CEA勒普林斯-里格特实验室）；Ghent University（根特大学）；Universidad Complutense de Madrid and IPARCOS, CEI Moncloa（马德里康普顿斯大学及IPARCOS、蒙克洛阿卓越国际中心）
Constraints on $N_{\rm{eff}}$ of high energy non-thermal neutrino injections upto $z\sim 10^8$ from CMB spectral distortions and abundance of light elements
