在 Tevatron 上研究 Drell-Yan 过程和高横动量喷注产生中的 underlying event
高能物理 - 实验
2012-04-20 v1 高能物理 - 唯象学
摘要
我们通过研究在质心能量为 1.96 TeV 的 CDF 实验中，与大横动量喷注（约 2.2 fb⁻¹）或 Z 玻色子质量区域（70 < M(对) < 110 GeV/c²）内的 Drell-Yan 轻子对（约 2.7 fb⁻¹）伴随产生的带电粒子（横动量 pT > 0.5 GeV/c，赝快度 |η| < 1）的行为，来研究质子-反质子对撞中的 underlying event。我们利用每个事件中轻子对（在 Drell-Yan 产生中）或领头喷注（在高 pT 喷注产生中）的方向，将 η-φ 空间划分为三个区域：朝向区、远离区和横向区，其中 φ 是方位角散射角。对于 Drell-Yan 产生（不包括轻子），朝向区和横向区都对 underlying event 非常敏感。在高 pT 喷注产生中，横向区对 underlying event 非常敏感，并被进一步划分为 MAX 和 MIN 横向区，这有助于将硬分量（初态和末态辐射）与散射中的束流-束流残余物和多部分子相互作用分量区分开。数据被修正到粒子级以去除探测器效应，然后与多个 QCD 蒙特卡洛模型进行比较。本分析的目标是提供可用于测试和改进用于模拟强子-强子对撞的 underlying event 的 QCD 蒙特卡洛模型的数据。
引用
@article{arxiv.1003.3146,
title = {Studying the Underlying Event in Drell-Yan and High Transverse Momentum Jet Production at the Tevatron},
author = {The CDF Collaboration and T. Aaltonen and J. Adelman and B. Alvarez Gonzalez and S. Amerio and D. Amidei and A. Anastassov and A. Annovi and J. Antos and G. Apollinari and A. Apresyan and T. Arisawa and A. Artikov and J. Asaadi and W. Ashmanskas and A. Attal and A. Aurisano and F. Azfar and W. Badgett and A. Barbaro-Galtieri and V. E. Barnes and B. A. Barnett and P. Barria and P. Bartos and G. Bauer and P. -H. Beauchemin and F. Bedeschi and D. Beecher and S. Behari and G. Bellettini and J. Bellinger and D. Benjamin and A. Beretvas and D. Berge and A. Bhatti and M. Binkley and D. Bisello and I. Bizjak and R. E. Blair and C. Blocker and B. Blumenfeld and A. Bocci and A. Bodek and V. Boisvert and D. Bortoletto and J. Boudreau and A. Boveia and B. Brau and A. Bridgeman and L. Brigliadori and C. Bromberg and E. Brubaker and J. Budagov and H. S. Budd and S. Budd and K. Burkett and G. Busetto and P. Bussey and A. Buzatu and K. L. Byrum and S. Cabrera and C. Calancha and S. Camarda and M. Campanelli and M. Campbell and F. Canelli and A. Canepa and B. Carls and D. Carlsmith and R. Carosi and S. Carrillon and S. Carron and B. Casal and M. Casarsa and A. Castrocc and P. Catastini and D. Cauz and V. Cavaliere and M. Cavalli-Sforza and A. Cerri and L. Cerrito and S. H. Chang and Y. C. Chen and M. Chertok and G. Chiarelli and G. Chlachidze and F. Chlebana and K. Cho and D. Chokheli and J. P. Chou and K. Chungo and W. H. Chung and Y. S. Chung and T. Chwalek and C. I. Ciobanu and M. A. Ciocci and A. Clark and D. Clark and G. Compostella and M. E. Convery and J. Conway and M. Corbo and M. Cordelli and C. A. Cox and D. J. Cox and F. Crescioli and C. Cuenca Almenar and J. Cuevas and R. Culbertson and J. C. Cully and D. Dagenhart and M. Datta and T. Davies and P. de Barbaro and S. De Cecco and A. Deisher and G. De Lorenzo and M. Dell'Orso and C. Deluca and L. Demortier and J. Deng and M. Deninno and M. d'Errico and A. Di Canto and G. P. di Giovanni and B. 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journal= {arXiv preprint arXiv:1003.3146},
year = {2012}
}
备注
Submitted to Phys.Rev.D