高能强子衍射碰撞中轻子-反轻子对和重夸克复合态的中心产生
Central production of lepton-antilepton pairs and heavy quark composite states in hadron diffractive collisions at ultrahigh energies
摘要：
本文研究了质子衍射碰撞（质子动量转移${|\bf q_\perp}|\sim m/\ln s$）中，在低能（$\ln{s}>>1$）下轻子-轻子对（$e^+e^-$和$μ^+μ^-$）和重夸克复合态（粲夸克态和底夸克态）的中心产生，其中$σ_{tot}(pp^\pm)\sim\ln^N s$与$1\la N\la 2$ . $pp^\pm$ -再散射修正，这是不小的，计算的$K$ -矩阵的方法修改的能量。本文详细讨论了强子相互作用的两种形式：（i）在黑盘模中的$σ_{tot}(pp^\pm)\sim\ln^2 s$、$σ_{inel}(pp^\pm)\sim\ln^2 s$的增长和（ii）在共振盘模中的$σ_{tot}(pp^\pm)\sim\ln^2 s$、$σ_{inel}(pp^\pm)\sim\ln s$的增长。衍射生产过程的能量行为对于这些模式有很大的不同，因此有可能区分不同版本的衍射能量相互作用。
英文摘要：
Central production of lepton-lepton pairs ($e^+e^-$ and $μ^+μ^-$) and heavy quark composite states (charmonia and bottomonia) in diffractive proton collisions (proton momenta transferred ${|\bf q_\perp}|\sim m/\ln s$) are studied at ultrahigh energies ($\ln{s}>>1$), where $σ_{tot}(pp^\pm)\sim\ln^N s$ with $1\la N\la 2$. The $pp^\pm$-rescattering corrections, which are not small, are calculated in terms of the $K$-matrix approach modified for ultrahigh energies. Two versions of hadron interactions are considered in detail: the growth (i) $σ_{tot}(pp^\pm)\sim\ln^2 s$, $σ_{inel}(pp^\pm)\sim\ln^2 s$ within the black disk mode and (ii) $σ_{tot}(pp^\pm)\sim\ln^2 s$, $σ_{inel}(pp^\pm)\sim\ln s$ within the resonant disk mode. The energy behavior of the diffractive production processes differs strongly for these modes, thus giving a possibility to distinguish between the versions of the ultrahigh energy interactions.
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