A Mechanism for Hadron Molecule Production in <i>pp</i>(<i>p</i>) Collisions
A Mechanism for Hadron Molecule Production in <i>pp</i>(<i>p</i>) Collisions作者机构：1Dipartimento di Fisica Sapienza Università di Roma Roma Italy 2Department of Physics Columbia University New York USA 1Dipartimento di Fisica Sapienza Università di Roma Roma Italy 2INFN Sezione di Roma 1 Roma Italy INFN Sezione di Pavia Pavia Italy
出 版 物：《Journal of Modern Physics》 (现代物理（英文）)
年 卷 期：2013年第4卷第12期
页 面：1569-1573页
学科分类：07[理学] 070202[理学-粒子物理与原子核物理] 0702[理学-物理学]
主 题：Exotic Spectroscopy Heavy Quark Phenomenology Hadron Scattering Monte Carlo Simulations
摘 要：The problem of understanding loosely bound hadron molecules prompt production at hadron colliders is still open: how is it possible that meson molecules with binding energy compatible with zero could be formed within the bulk of the hadrons ejected in very high energy collisions? Monte Carlo simulations have been performed in the literature, leading to production cross sections, two orders of magnitude which were smaller than the experimental value. One possible mechanism to reduce this gap could be final state interactions of heavy mesons, but a precise evaluation of such effect is challenged by the presence of pions between the molecular constituents. In this paper, we present a new mechanism by using precisely such comoving pions. Heavy meson pairs can indeed slow down because of elastic scattering with surrounding pions. The number of low-relative-momentum meson pairs increases, thereby enhancing prompt production cross section. In this preliminar simulation, we show that an enhancement of 100 is indeed possible.
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