发布求助
文献互助 智能选刊 最新文献

Proceedings of Loops and Legs in Quantum Field Theory — PoS(LL2022)最新文献

筛选
英文 中文
Two- and three-loop QCD corrections to the width difference in the $B_s - bar{B}_s$ system. 在$B_s - bar{B}_s$系统中对宽度差的两回和三回QCD校正。
Proceedings of Loops and Legs in Quantum Field Theory — PoS(LL2022) Pub Date : 2022-10-20 DOI: 10.22323/1.416.0054
Vladyslav Shtabovenko
{"title":"Two- and three-loop QCD corrections to the width difference in the $B_s - bar{B}_s$ system.","authors":"Vladyslav Shtabovenko","doi":"10.22323/1.416.0054","DOIUrl":"https://doi.org/10.22323/1.416.0054","url":null,"abstract":"","PeriodicalId":151433,"journal":{"name":"Proceedings of Loops and Legs in Quantum Field Theory — PoS(LL2022)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-10-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130605539","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Automating antenna subtraction in color space 彩色空间中天线减法的自动化
Proceedings of Loops and Legs in Quantum Field Theory — PoS(LL2022) Pub Date : 2022-10-20 DOI: 10.22323/1.416.0061
M. Marcoli
{"title":"Automating antenna subtraction in color space","authors":"M. Marcoli","doi":"10.22323/1.416.0061","DOIUrl":"https://doi.org/10.22323/1.416.0061","url":null,"abstract":"We present the colourful antenna subtraction method, a reformulation of the antenna subtraction scheme for next-to-next-to-leading order (NNLO) calculations in QCD. The aim of this new approach is to achieve a general and process-independent construction of the subtraction infrastructure at NNLO. We rely on the predictability of the infrared singularity structure of one- and two-loop amplitudes in colour space to generate virtual subtraction terms and, subsequently, we define an automatable procedure to systematically infer the expression of the real subtraction terms, guided by the correspondence between unintegrated and integrated antenna functions. To demonstrate the applicability of the described approach, we compute the full colour NNLO correction to gluonic three-jet production pp ( gg ) → ggg , for gluons-only subprocesses.","PeriodicalId":151433,"journal":{"name":"Proceedings of Loops and Legs in Quantum Field Theory — PoS(LL2022)","volume":"26 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-10-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121205352","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Two-loop helicity amplitudes for W/Z boson pair production in gluon fusion with exact top mass dependence 具有精确顶质量依赖的胶子聚变W/Z玻色子对产生的双环螺旋振幅
Proceedings of Loops and Legs in Quantum Field Theory — PoS(LL2022) Pub Date : 2022-10-20 DOI: 10.22323/1.416.0030
Christian Brønnum-Hansen, Chen-Yu Wang
{"title":"Two-loop helicity amplitudes for W/Z boson pair production in gluon fusion with exact top mass dependence","authors":"Christian Brønnum-Hansen, Chen-Yu Wang","doi":"10.22323/1.416.0030","DOIUrl":"https://doi.org/10.22323/1.416.0030","url":null,"abstract":"We compute the top quark contribution to the two-loop amplitudes for on-shell W / Z boson pair production in gluon fusion, gg → WW and gg → ZZ . Exact dependence on the top quark mass is retained, the bottom quark is considered massless. Integral reduction is performed numerically for each phase space point and the master integrals are evaluated using the auxiliary mass flow method. This allows for fast computation of the amplitudes to very high precision.","PeriodicalId":151433,"journal":{"name":"Proceedings of Loops and Legs in Quantum Field Theory — PoS(LL2022)","volume":"13 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-10-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123696276","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 3
Mixed QCD-EW corrections to the Drell-Yan process Drell-Yan过程的混合QCD-EW修正
Proceedings of Loops and Legs in Quantum Field Theory — PoS(LL2022) Pub Date : 2022-10-20 DOI: 10.22323/1.416.0008
L. Buonocore
{"title":"Mixed QCD-EW corrections to the Drell-Yan process","authors":"L. Buonocore","doi":"10.22323/1.416.0008","DOIUrl":"https://doi.org/10.22323/1.416.0008","url":null,"abstract":"Precise predictions of hard scattering processes at the LHC usually require the inclusion of NNLO corrections in QCD and NLO in EW. For some specific cases, this might not be sufficient to match the experimental accuracy, and higher-order radiative contributions must be taken into account too. In such situations, effects due the interplay among strong and electroweak interactions may be relevant. The Drell-Yan process provides a promiment example of ultra precision physics at the LHC. We recently completed the first calculation of the mixed QCD-EW corrections to the neutral current Drell-Yan process for massive leptons. In this proceeding, we elaborate on the comparison of the exact two-loop virtual amplitude with its approximation by a pole expansion and show phenomelogical results in the region of high invariant masses of the lepton pair system.","PeriodicalId":151433,"journal":{"name":"Proceedings of Loops and Legs in Quantum Field Theory — PoS(LL2022)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-10-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129809982","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Tensor decomposition for multiloop, multileg helicity amplitudes 多环、多腿螺旋振幅的张量分解
Proceedings of Loops and Legs in Quantum Field Theory — PoS(LL2022) Pub Date : 2022-10-20 DOI: 10.22323/1.416.0020
L. Tancredi
{"title":"Tensor decomposition for multiloop, multileg helicity amplitudes","authors":"L. Tancredi","doi":"10.22323/1.416.0020","DOIUrl":"https://doi.org/10.22323/1.416.0020","url":null,"abstract":"In this contribution I will present new ideas to simplify the form factor method in order to compute helicity amplitudes for multiloop multileg scattering amplitudes, directly in the so-called ’t Hooft-Veltman scheme, avoiding evanescent structures and ambiguities in the scheme definitions.","PeriodicalId":151433,"journal":{"name":"Proceedings of Loops and Legs in Quantum Field Theory — PoS(LL2022)","volume":"1999 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-10-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125721054","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
ZH Production in Gluon Fusion at NLO NLO胶子聚变中ZH的产生
Proceedings of Loops and Legs in Quantum Field Theory — PoS(LL2022) Pub Date : 2022-10-20 DOI: 10.22323/1.416.0029
S. Jones
{"title":"ZH Production in Gluon Fusion at NLO","authors":"S. Jones","doi":"10.22323/1.416.0029","DOIUrl":"https://doi.org/10.22323/1.416.0029","url":null,"abstract":"We summarise the calculation of the two-loop next-to-leading order QCD corrections to Z boson plus Higgs boson production in gluon fusion. The result presented includes full top-quark mass effects and is obtained by combining two-loop virtual contributions computed numerically, using sector decomposition, with virtual contributions obtained in a high-energy expansion. We find that the corrections enhance the cross-section by approximately a factor of 2 and reduce the renormalisation and factorisation scale uncertainty by around 30%. For a centre of mass energy of √ 𝑠 = 13 . 6 TeV we obtain We also observe that the choice of top-quark mass renormalisation scheme can have a significant impact on the prediction.","PeriodicalId":151433,"journal":{"name":"Proceedings of Loops and Legs in Quantum Field Theory — PoS(LL2022)","volume":"35 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-10-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131743860","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Progress in two-loop Master Integrals computation 双环主积分计算的研究进展
Proceedings of Loops and Legs in Quantum Field Theory — PoS(LL2022) Pub Date : 2022-10-20 DOI: 10.22323/1.416.0021
C. Papadopoulos, A. Kardos, A. Smirnov, N. Syrrakos, C. Wever
{"title":"Progress in two-loop Master Integrals computation","authors":"C. Papadopoulos, A. Kardos, A. Smirnov, N. Syrrakos, C. Wever","doi":"10.22323/1.416.0021","DOIUrl":"https://doi.org/10.22323/1.416.0021","url":null,"abstract":"Over the last years, master integral families at one, two and three loops, with up to five external particles, including off-shell legs and internal masses have been computed analytically based on the Simplified Differential Equations approach. In this presentation we focus on the latest results for two-loop five-point Feynman Integrals with one off-shell leg. The three planar and one of the non-planar families have been fully expressed in terms of Goncharov polylogarithms. For the other two non-planar families, we introduce a new approach to obtain the boundary terms and establish a one-dimensional integral representation of the master integrals in terms of generalised polylogarithms, when the alphabet contains non-factorizable square roots. The results are relevant to the study of NNLO QCD corrections for W , Z and Higgs-boson production in association with two hadronic jets. and in -","PeriodicalId":151433,"journal":{"name":"Proceedings of Loops and Legs in Quantum Field Theory — PoS(LL2022)","volume":"8 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-10-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123105513","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Scattering amplitudes and conservative dynamics at the fourth post-Minkowskian order 后闵可夫斯基四阶散射振幅和保守动力学
Proceedings of Loops and Legs in Quantum Field Theory — PoS(LL2022) Pub Date : 2022-10-20 DOI: 10.22323/1.416.0051
M. Ruf, Z. Bern, Julio Parra-Martinez, R. Roiban, Chia-Hsien Shen, M. Solon, M. Zeng
{"title":"Scattering amplitudes and conservative dynamics at the fourth post-Minkowskian order","authors":"M. Ruf, Z. Bern, Julio Parra-Martinez, R. Roiban, Chia-Hsien Shen, M. Solon, M. Zeng","doi":"10.22323/1.416.0051","DOIUrl":"https://doi.org/10.22323/1.416.0051","url":null,"abstract":"We review recent progress using amplitudes methods to obtain new results for the conservative classical scattering of two massive black holes at order O( 𝐺 4 ) . We include contributions from both potential and radiation modes which effect the conservative dynamics through the tail effect. We compute the 2 → 2 scattering amplitudes and extract the radial action through the amplitude-action formula and derive the scattering angle. By matching we also obtain a Hamiltonian valid for arbitrary scattering trajectories.","PeriodicalId":151433,"journal":{"name":"Proceedings of Loops and Legs in Quantum Field Theory — PoS(LL2022)","volume":"7 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-10-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132591375","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 11
Vector and axial-vector coefficient functions for DVCS at NNLO NNLO地区DVCS的矢量和轴矢量系数函数
Proceedings of Loops and Legs in Quantum Field Theory — PoS(LL2022) Pub Date : 2022-10-20 DOI: 10.22323/1.416.0074
A. Manashov, V. Braun, S. Moch, J. Schoenleber
{"title":"Vector and axial-vector coefficient functions for DVCS at NNLO","authors":"A. Manashov, V. Braun, S. Moch, J. Schoenleber","doi":"10.22323/1.416.0074","DOIUrl":"https://doi.org/10.22323/1.416.0074","url":null,"abstract":"We calculate the two-loop coefficient functions for the (axial-) vector flavor-nonsinglet contributions in processes with one real and one virtual photon. We present the analytic expressions for the coefficient functions in momentum fraction space and estimate their effect on the physical observable. The calculated NNLO corrections appear to be rather large and have to be taken into account.","PeriodicalId":151433,"journal":{"name":"Proceedings of Loops and Legs in Quantum Field Theory — PoS(LL2022)","volume":"86 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-10-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116667476","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
Kira and the block-triangular form 基拉和方块三角形
Proceedings of Loops and Legs in Quantum Field Theory — PoS(LL2022) Pub Date : 2022-10-20 DOI: 10.22323/1.416.0071
J. Usovitsch
{"title":"Kira and the block-triangular form","authors":"J. Usovitsch","doi":"10.22323/1.416.0071","DOIUrl":"https://doi.org/10.22323/1.416.0071","url":null,"abstract":"For many state-of-the-art cross section computations the standard approach of Feynman integral reduction with the Laporta algorithm is the main bottleneck of the computation. We study a new approach of Feynman integral reduction by introducing a block-triangular form, which is a smaller system of equations compared to the system of equations which is generated with the Laporta algorithm. The construction of the block-triangular form and its implementation in the program Kira is the main interest of this report.","PeriodicalId":151433,"journal":{"name":"Proceedings of Loops and Legs in Quantum Field Theory — PoS(LL2022)","volume":"78 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-10-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122203368","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
下一页 尾页
0
×
引用
GB/T 7714-2015
复制
MLA
复制
APA
复制
导出至
BibTeX EndNote RefMan NoteFirst NoteExpress
×
提示
您的信息不完整，为了账户安全，请先补充。
现在去补充
×
提示
您因"违规操作"
具体请查看互助需知
我知道了
×
提示
现在去查看 取消
×
提示
确定
请完成安全验证×
相关产品
×
本文献相关产品
联系我们：info@booksci.cn Book学术提供免费学术资源搜索服务，方便国内外学者检索中英文文献。致力于提供最便捷和优质的服务体验。 Copyright © 2023 布克学术 All rights reserved.
京ICP备2023020795号-1
ghs 京公网安备 11010802042870号
Book学术文献互助
Book学术文献互助群
群 号：604180095
Book学术官方微信