论文标题
$ pp $和$ p {\ bar p} $与新的未集成pdf碰撞的drell-yan流程的高能分解
High-Energy Factorization for Drell-Yan process in $pp$ and $p{\bar p}$ collisions with new Unintegrated PDFs
论文作者
论文摘要
在高能量分解的框架中，提出了用于均匀横向摩托频谱的均匀描述的形式主义，该框架在$ | {\ bf q} _t _t | \ ll q $和通常的$ | collinear parton模型$ | ll { \ sqrt {s} $。引入了来自共线的新公式（updfs），引入了$ z $ -boson $ | {\ bf q} _t | $ -spectrum的出色描述，在高能高达$ | {\ bf q} _t _t _t _t _t |/\ sqrt} $ sqrt} s e {归一化$ | {\ bf q} _t | $ -distributions的描述是通过Quark Updfs的非扰动参数的拟合来实现的。还可以通过新的UPDF来获得对Dilepton质量中心框架中瘦素角分布的合理描述。
The formalism for uniform description of Drell-Yan transverse-momentum spectrum is presented in a framework of High-Energy Factorization, which smoothly interpolates between Collins-Soper-Sterman formalism at $|{\bf q}_T|\ll Q$ and usual Collinear Parton Model at $|{\bf q}_T|\sim Q\ll \sqrt{S}$. The new formula for deriving Unintegrated Parton Distribution Functions(UPDFs) from collinear ones is introduced, which leads to excellent description of the shape of $Z$-boson $|{\bf q}_T|$-spectrum at high energies up to $|{\bf q}_T|/\sqrt{S}\simeq 0.02$. Description of normalized $|{\bf q}_T|$-distributions at low energies is achieved via the fit of non-perturbative parameters of quark UPDFs. Reasonable description of angular distributions of leptons in the dilepton center-of-mass frame is also obtained with new UPDFs.
