Prospects of discovering stable double-heavy tetraquarks at a Tera- Z factory

Ali, Ahmed (Deutsches Elektronen-Synchrotron DESY, Hamburg, D-22607, Germany) ; Parkhomenko, Alexander Ya. (Department of Theoretical Physics, P. G. Demidov Yaroslavl State University, Sovietskaya 14, Yaroslavl, 150003, Russia) ; Qin, Qin (Theoretische Physik 1, Naturwissenschaftlich-Technische Fakultät, Universität Siegen, Walter-Flex-Strasse 3, Siegen, D-57068, Germany) ; Wang, Wei (INPAC, Shanghai Key Laboratory for Particle Physics and Cosmology, MOE Key Laboratory for Particle Physics, School of Physics and Astronomy, Shanghai Jiao Tong University, Shanghai, 200240, China)

22 May 2018

Abstract: Motivated by a number of theoretical considerations, predicting the deeply bound double-heavy tetraquarks T[u¯d¯]{bb} , T[u¯s¯]{bb} and T[d¯s¯]{bb} , we explore the potential of their discovery at Tera- Z factories. Using the process Z→bb¯bb¯ , we calculate, employing the Monte Carlo generators MadGraph5_aMC@NLO and Pythia6, the phase space configuration in which the bb pair is likely to fragment as a diquark. In a jet-cone, defined by an invariant mass interval mbb


Published in: Physics letters B (2018)
Published by: Elsevier
DOI: 10.1016/j.physletb.2018.05.055
License: CC-BY-3.0



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