发布求助
文献互助 智能选刊 最新文献

Proceedings of 14th International Symposium on Radiative Corrections — PoS(RADCOR2019)最新文献

筛选
英文 中文
Completing the four-body contributions to $bar{B}rightarrow X_s gamma$ at NLO 完成对NLO $bar{B}rightarrow X_s gamma$的四主体贡献
Proceedings of 14th International Symposium on Radiative Corrections — PoS(RADCOR2019) Pub Date : 2019-12-17 DOI: 10.22323/1.375.0031
T. Huber, Lars-Thorben Moos
{"title":"Completing the four-body contributions to $bar{B}rightarrow X_s gamma$ at NLO","authors":"T. Huber, Lars-Thorben Moos","doi":"10.22323/1.375.0031","DOIUrl":"https://doi.org/10.22323/1.375.0031","url":null,"abstract":"We report on the status of the ongoing calculation of multiparticle contributions to the inclusive radiative $bar{B} rightarrow X_s gamma$ decay at next-to leading order. This effort amounts to the evaluation of the four-particle process $brightarrow s bar{q} q gamma$ at the one-loop level, supplemented by the corresponding five-particle tree-level cuts $brightarrow s bar{q} q gamma + g$ of the gluon bremsstrahlung. Knowledge of these pieces will formally complete the $bar{B} rightarrow X_s gamma$ decay at the next-to-leading order. The different steps such as the generation of the amplitude, its \u0000renormalization, and the treatment of occuring IR-divergences are discussed. Moreover, we elaborate on the subtleties that arise when treating $gamma_5$ in $D$ dimensions.","PeriodicalId":440413,"journal":{"name":"Proceedings of 14th International Symposium on Radiative Corrections — PoS(RADCOR2019)","volume":"86 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-12-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116744934","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
Top-quark hadroproduction in NNLO QCD NNLO QCD中顶夸克的产子
Proceedings of 14th International Symposium on Radiative Corrections — PoS(RADCOR2019) Pub Date : 2019-12-16 DOI: 10.22323/1.375.0004
Simone Devoto
{"title":"Top-quark hadroproduction in NNLO QCD","authors":"Simone Devoto","doi":"10.22323/1.375.0004","DOIUrl":"https://doi.org/10.22323/1.375.0004","url":null,"abstract":"The study of top-quark production and decay is central in the LHC physics programme, allowing precise tests of the Standard Model and offering a window on possible new physics. Accurate theoretical predictions for this process are therefore crucial. We report on a new calculation of the next-to-next-to-leading order QCD radiative corrections to the production of top-quark pairs at hadron colliders. The calculation is performed by using the $q_T$-subtraction method to handle and cancel infrared singular contributions at intermediate stages of the computation, and it represents its first complete application to the hadroproduction of a colourful high-mass system at next-to-next-to-leading order. We discuss the calculation of the additional soft contributions needed to implement $q_T$ subtraction for this process, and we show first numerical results.","PeriodicalId":440413,"journal":{"name":"Proceedings of 14th International Symposium on Radiative Corrections — PoS(RADCOR2019)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-12-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130104895","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
Shape analysis in Higgs boson pair production 希格斯玻色子对产生中的形状分析
Proceedings of 14th International Symposium on Radiative Corrections — PoS(RADCOR2019) Pub Date : 2019-12-15 DOI: 10.22323/1.375.0018
M. Capozi, G. Heinrich
{"title":"Shape analysis in Higgs boson pair production","authors":"M. Capozi, G. Heinrich","doi":"10.22323/1.375.0018","DOIUrl":"https://doi.org/10.22323/1.375.0018","url":null,"abstract":"We study the impact of anomalous couplings in the Higgs sector on the shape of the Higgs boson pair invariant mass distribution at NLO. Our analysis is based on a five-dimensional coupling parameter space relevant for Higgs boson pair production in gluon fusion, in the framework of a non-linear Effective Field Theory. In particular, we present a clustering procedure into certain shape types based on unsupervised machine learning, with the aim to infer information about the underlying parameter space from a given shape type.","PeriodicalId":440413,"journal":{"name":"Proceedings of 14th International Symposium on Radiative Corrections — PoS(RADCOR2019)","volume":"54 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-12-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123480607","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 QCD Helicity Amplitudes for Higgs Production Associated with a Vector Boson through Bottom Quark Annihilation 通过底夸克湮灭与矢量玻色子相关的希格斯产生的双环QCD螺旋振幅
Proceedings of 14th International Symposium on Radiative Corrections — PoS(RADCOR2019) Pub Date : 2019-12-13 DOI: 10.22323/1.375.0010
Taushif Ahmed, A. H. Ajjath, Long-Bin Chen, P. K. Dhani, Pooja Mukherjee, V. Ravindran
{"title":"Two-Loop QCD Helicity Amplitudes for Higgs Production Associated with a Vector Boson through Bottom Quark Annihilation","authors":"Taushif Ahmed, A. H. Ajjath, Long-Bin Chen, P. K. Dhani, Pooja Mukherjee, V. Ravindran","doi":"10.22323/1.375.0010","DOIUrl":"https://doi.org/10.22323/1.375.0010","url":null,"abstract":"We present the two-loop QCD corrections to the amplitude of the Higgs production associated with a $Z$ boson via the bottom quark-antiquark annihilation channel with a non-vanishing bottom-quark Yukawa coupling. The computation is performed by projecting the D-dimensional scattering amplitude directly onto a set of Lorentz structures related to the linear polarisation states of the $Z$ boson. We cross-check the finite remainders through a computation based on conventional form factor decomposition. We show that for physical observables, an ultimate D-dimensional form factor decomposition of amplitudes is not necessary which has a huge potential to simplify a multiloop computation. We compute numerically the resulting cross sections under the soft-virtual approximation to NNLO and find it three orders of magnitude smaller than that of the s-channel.","PeriodicalId":440413,"journal":{"name":"Proceedings of 14th International Symposium on Radiative Corrections — PoS(RADCOR2019)","volume":"94 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-12-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134348278","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
Diagrammatic Coaction of Two-Loop Feynman Integrals 双环Feynman积分的图解协同作用
Proceedings of 14th International Symposium on Radiative Corrections — PoS(RADCOR2019) Pub Date : 2019-12-13 DOI: 10.22323/1.375.0065
S. Abreu, R. Britto, C. Duhr, E. Gardi, J. Matthew
{"title":"Diagrammatic Coaction of Two-Loop Feynman Integrals","authors":"S. Abreu, R. Britto, C. Duhr, E. Gardi, J. Matthew","doi":"10.22323/1.375.0065","DOIUrl":"https://doi.org/10.22323/1.375.0065","url":null,"abstract":"It is known that one-loop Feynman integrals possess an algebraic structure encoding some of their analytic properties called the coaction, which can be written in terms of Feynman integrals and their cuts. This diagrammatic coaction, and the coaction on other classes of integrals such as hypergeometric functions, may be expressed using suitable bases of differential forms and integration contours. This provides a useful framework for computing coactions of Feynman integrals expressed using the hypergeometric functions. We will discuss examples where this technique has been used in the calculation of two-loop diagrammatic coactions.","PeriodicalId":440413,"journal":{"name":"Proceedings of 14th International Symposium on Radiative Corrections — PoS(RADCOR2019)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-12-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129529521","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: 9
Two-loop non-planar master integrals for top-pair production in the quark-annihilation channel 夸克湮灭通道中产生顶对的双环非平面主积分
Proceedings of 14th International Symposium on Radiative Corrections — PoS(RADCOR2019) Pub Date : 2019-12-12 DOI: 10.22323/1.375.0068
M. Becchetti, R. Bonciani, Valerio Casconi, A. Ferroglia, Simone Lavacca, A. Manteuffel
{"title":"Two-loop non-planar master integrals for top-pair production in the quark-annihilation channel","authors":"M. Becchetti, R. Bonciani, Valerio Casconi, A. Ferroglia, Simone Lavacca, A. Manteuffel","doi":"10.22323/1.375.0068","DOIUrl":"https://doi.org/10.22323/1.375.0068","url":null,"abstract":"We present the analytic computation of the master integrals associated to certain two-loop non-planar topologies, which are needed to complete the evaluation of the last two color coefficients for the top-pair production in the quark-annihilation channel, which are not yet known analytically. The master integrals have been computed exploiting the differential equations method in canonical form. The solution is given as a series expansion in the dimensional regularization parameter through to weight four, the expansion coefficients are given in terms of multiple polylogarithms.","PeriodicalId":440413,"journal":{"name":"Proceedings of 14th International Symposium on Radiative Corrections — PoS(RADCOR2019)","volume":"11 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-12-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114498736","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
Photon pair production in gluon fusion: Top quark effects around threshold 胶子聚变中的光子对产生:阈值附近的顶夸克效应
Proceedings of 14th International Symposium on Radiative Corrections — PoS(RADCOR2019) Pub Date : 2019-12-12 DOI: 10.22323/1.375.0026
Long-Bin Chen, G. Heinrich, S. Jahn, S. Jones, M. Kerner, J. Schlenk, H. Yokoya
{"title":"Photon pair production in gluon fusion: Top quark effects around threshold","authors":"Long-Bin Chen, G. Heinrich, S. Jahn, S. Jones, M. Kerner, J. Schlenk, H. Yokoya","doi":"10.22323/1.375.0026","DOIUrl":"https://doi.org/10.22323/1.375.0026","url":null,"abstract":"We present a calculation of the NLO QCD corrections to the loop-induced production of a photon pair through gluon fusion, including massive top quarks at two loops. The two-loop virtual amplitudes are computed via projecting onto a set of Lorentz structures related to linear polarisation states of external gauge bosons. All two-loop master integrals dependent on the top quark mass are evaluated numerically. Matching the fixed order NLO result to a calculation with threshold resummation, we obtain an accurate description of the diphoton invariant mass spectrum around the threshold of top quark pair production. We analyse how the distribution of the diphoton invariant mass is affected by the top quark loop-induced corrections, especially around the top quark pair production threshold.","PeriodicalId":440413,"journal":{"name":"Proceedings of 14th International Symposium on Radiative Corrections — PoS(RADCOR2019)","volume":"39 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-12-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128630285","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
Padé approach to top-quark mass effects in gluon fusion amplitudes 胶子聚变振幅中顶夸克质量效应的研究
Proceedings of 14th International Symposium on Radiative Corrections — PoS(RADCOR2019) Pub Date : 2019-12-09 DOI: 10.22323/1.375.0079
J. Davies, R. Grober, A. Maier, T. Rauh, M. Steinhauser
{"title":"Padé approach to top-quark mass effects in gluon fusion amplitudes","authors":"J. Davies, R. Grober, A. Maier, T. Rauh, M. Steinhauser","doi":"10.22323/1.375.0079","DOIUrl":"https://doi.org/10.22323/1.375.0079","url":null,"abstract":"Gluon fusion processes like single and double Higgs production exhibit slow convergence and pose severe computational challenges. We show how the top-quark mass dependence of the virtual amplitudes can be reconstructed with a conformal mapping and Pad'e approximants based on the expansion in the inverse top-quark mass and the non-analytic terms in the expansion around the top threshold. The method is then applied at two- and three-loop order.","PeriodicalId":440413,"journal":{"name":"Proceedings of 14th International Symposium on Radiative Corrections — PoS(RADCOR2019)","volume":"10 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-12-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124459405","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: 4
Calculating the static gravitational two-body potential to fifth post-Newtonian order with Feynman diagrams 用费曼图计算后牛顿五阶静态引力二体势
Proceedings of 14th International Symposium on Radiative Corrections — PoS(RADCOR2019) Pub Date : 2019-12-08 DOI: 10.22323/1.375.0027
S. Foffa, P. Mastrolia, R. Sturani, C. Sturm, W. J. T. Bobadilla
{"title":"Calculating the static gravitational two-body potential to fifth post-Newtonian order with Feynman diagrams","authors":"S. Foffa, P. Mastrolia, R. Sturani, C. Sturm, W. J. T. Bobadilla","doi":"10.22323/1.375.0027","DOIUrl":"https://doi.org/10.22323/1.375.0027","url":null,"abstract":"We discuss the first-time calculation of the static gravitational two-body potential up to fifth post-Newtonian(PN) order. The results are achieved through a manifest factorization property of the odd PN diagrams. The factorization property is illustrated also at first and third PN order.","PeriodicalId":440413,"journal":{"name":"Proceedings of 14th International Symposium on Radiative Corrections — PoS(RADCOR2019)","volume":"354 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-12-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132449898","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
The Gravitational Potential of Two Point Masses at Five Loops 两点质量在五环处的引力势
Proceedings of 14th International Symposium on Radiative Corrections — PoS(RADCOR2019) Pub Date : 2019-12-06 DOI: 10.22323/1.375.0029
J. Blumlein, A. Maier, P. Marquard
{"title":"The Gravitational Potential of Two Point Masses at Five Loops","authors":"J. Blumlein, A. Maier, P. Marquard","doi":"10.22323/1.375.0029","DOIUrl":"https://doi.org/10.22323/1.375.0029","url":null,"abstract":"Corrections to the Newtonian gravitational potential from general relativity can be derived in a combined expansion around flat spacetime and a small velocity of the interacting bodies. We present the calculation of the static five-loop corrections in an effective field theory framework using techniques from multi-loop computations in particle physics.","PeriodicalId":440413,"journal":{"name":"Proceedings of 14th International Symposium on Radiative Corrections — PoS(RADCOR2019)","volume":"266 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-12-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131508882","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
首页 上一页 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：481959085
Book学术官方微信