We study soft and collinear gluon emission in squark decays to quark-neutralino pair, at next-to-next-to-leading logarithmic (NNLL) accuracy in the end-point region, using soft collinear effective theory (SCET), and at next-to-leading (NLO) fixed order in the rest of the phase space. As a phenomenological case study we discuss the impact of radiative corrections on the simultaneous measurements of squark and neutralino masses at a linear e+e- collider based on s=3 TeV Compact Linear Collider (CLIC), and show the softening of distributions in the sum of energies of the first two hardest jets or in the MC variable. Since the majority of mass measurement techniques are based on edges in kinematic distributions, and these change appreciably when there is additional QCD radiation in the final state, the knowledge of higher-order QCD effects is required for precise mass determinations.
Bibliographical noteFunding Information:
J. H. K. is grateful to Kyongchul Kong and Ian M. Lewis for useful discussions and suggestions during the course of this project. C. K. is supported by Basic Science Research Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Science and ICT (Grant No. NRF2017R1A2B4010511). J. H. K. was supported in part by United States Department of Energy Grant No. DE-SC0017988 and by the University of Kansas General Research Fund allocation 2302091. J. H. K. acknowledges the support in part by National Science Foundation under Grant No. PHY1820860 and No. PHY1230860. S. L. was supported by Basic Science Research Program through the National Research Foundation of Korea(NRF) funded by the Ministry of Education (Grant No. NRF-2018R1D1A1B07049148), by the Korea government (MEST) (Grant No. NRF-2015R1A2A1A15052408). J. Z. acknowledges support in part by the DOE Grant No. de-sc0011784.
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ASJC Scopus subject areas
- Nuclear and High Energy Physics