Unintegrated parton distributions and prompt photon hadroproduction

Unintegrated parton distributions and prompt photon hadroproduction
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未积分的部分子分布和即时光子强子产生

DOI:
10.1007/s100520000326
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发表时间:
1999
期刊:
The European Physical Journal C - Particles and Fields
影响因子:
--
通讯作者:
M. Ryskin
M. Ryskin
中科院分区:
--
文献类型:
--
作者:
M. A. Kimber;Alan D. Martin;M. Ryskin

文献摘要

被引文献

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我们引入了一个一般的表达式,使部分子分布,未整合的部分子横动量,从传统的部分子密度。我们利用该方法研究了入射部分子系统的横动量对高能碰撞中产生的瞬发光子的横动量谱计算的影响。为了说明的目的,我们使用双对数近似。对于大,我们直接从微扰形式主义计算的效果,而对于小,我们绑定的效果使用两个极端的假设。在这两个区域中,我们发现,虽然截面增强了,但瞬时光子谱的形状并没有明显的改变。
We introduce a general expression which enables the parton distribution, unintegrated over the parton transverse momentum, to be obtained from the conventional parton densities. We use the formalism to study the effects of the transverse momentumof the incoming partonic system on the calculation of the transverse momentum spectra of prompt photons produced in high energyppandcollisions. For the purposes of illustration, we use the double logarithm approximation. For largewe calculate the effect directly from the perturbative formalism, whereas for smallwe bound the effect using two extreme hypotheses. In bothdomains we find that the shapes of the prompt photon spectra are not significantly modified, although the cross sections are enhanced.