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arXiv 1407.3115hep-ph
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大快度分离双喷流的产生:Mueller-Navelet机制与双部分子散射

Production of dijets with large rapidity separation: Mueller-Navelet mechanism versus double-parton scattering

Rafal Maciula, Antoni Szczurek

摘要:

在大快度距离喷流的背景下,我们讨论了在LHC双部分子散射(DPS)机制下4喷流末态的强子产生。对于计划的和/或当前正在进行的高能实验,这是搜索BFKL信号的主要兴趣所在的运动学区域。DPS贡献在所谓的因子分解Ancillary中以LO共线方法计算。我们表明,DPS的相对贡献是增长相对于标准的单部分子散射(SPS)生产的dijets和BFKL Mueller-Navelet(MN)射流机制在大的快度距离射流。这与最近研究的双$D$和双$J/\!ψ$介子产生的DPS效应是一致的。计算的微分截面作为一个函数的快速性之间的距离是最远的快度的射流进行比较与最近的结果的LL和NLL BFKL计算Mueller Navelet射流生产在$\sqrt{s} = 7$ TeV。详细研究了$\sqrt{s}$ = 7 TeV和$\sqrt{s}$ = 14 TeV时在不同喷流横动量范围内DPS的贡献。

英文摘要:

We discuss hadroproduction of 4-jet final state at the LHC within the double-parton scattering (DPS) mechanism in the context of large-rapidity-distance jets. For planned and/or being currently performed high energy experiments this is the kinematical region where searches for BFKL signal are of the main interest. The DPS contributions are calculated in the LO collinear approach within the so-called factorized Ansatz. We show that the relative contribution of DPS is growing with respect to standard single-parton scattering (SPS) production of dijets and to the BFKL Mueller-Navelet (MN) jet mechanism at large rapidity distance between jets. This is consistent with recent studies of DPS effects in the case of double $D$ and double $J/\!ψ$ meson production. The calculated differential cross sections as a function of rapidity distance between the jets that are the most distant in rapidity are compared with recent results of LL and NLL BFKL calculations for the Mueller-Navelet jet production at $\sqrt{s} = 7$ TeV. The DPS contribution is carefully studied for $\sqrt{s}$ = 7 TeV and $\sqrt{s}$ = 14 TeV and in different ranges of jet transverse momenta.

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