Buonocore Luca, Grazzini Massimiliano, Tramontano Francesco
1Dipartimento di Fisica, Università di Napoli Federico II and INFN, Sezione di Napoli, 80126 Naples, Italy.
2Physik Institut, Universität Zürich, 8057 Zürich, Switzerland.
Eur Phys J C Part Fields. 2020;80(3):254. doi: 10.1140/epjc/s10052-020-7815-z. Epub 2020 Mar 19.
Building upon the formulation of transverse-momentum resummation for heavy-quark hadroproduction, we present the first application of the subtraction formalism to the computation of electroweak corrections to massive lepton pairs through the Drell-Yan mechanism. We then study the power suppressed contributions to the subtraction formula in the parameter , defined as the minimum transverse momentum of the lepton pair normalised to its invariant mass. We analytically compute the leading power correction from initial and final-state radiation to the inclusive cross section. In the case of initial-state radiation the power correction is in and our analytic result is consistent with results previously obtained in the literature. Final-state radiation produces contributions in that may challenge the efficiency of the subtraction procedure. We explicitly compute the linear power correction in the case of the inclusive cross section and we discuss the extension of our calculation to differential distributions.
基于重夸克强子产生的横向动量重整化公式，我们首次将减法形式主义应用于通过德雷尔-杨机制对大质量轻子对的电弱修正计算。然后，我们研究了在参数(\Lambda)（定义为轻子对的最小横向动量除以其不变质量）下对减法公式的幂次压低贡献。我们解析计算了初始态和末态辐射对 inclusive 截面的主导幂次修正。在初始态辐射的情况下，幂次修正是(\alpha_s^2)，我们的解析结果与文献中先前获得的结果一致。末态辐射在(\alpha_s^3)中产生贡献，这可能对减法程序的效率构成挑战。我们明确计算了 inclusive 截面情况下的线性幂次修正，并讨论了将我们的计算扩展到微分分布的情况。
