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Proceedings of Loops and Legs in Quantum Field Theory — PoS(LL2018)最新文献

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Precise determination of the strong coupling from energy-energy correlation 从能量-能量相关中精确确定强耦合
Proceedings of Loops and Legs in Quantum Field Theory — PoS(LL2018) Pub Date : 2018-10-02 DOI: 10.22323/1.303.0030
Z. Tulipánt, A. Kardos, S. Kluth, G. Somogyi, A. Verbytskyi
{"title":"Precise determination of the strong coupling from energy-energy correlation","authors":"Z. Tulipánt, A. Kardos, S. Kluth, G. Somogyi, A. Verbytskyi","doi":"10.22323/1.303.0030","DOIUrl":"https://doi.org/10.22323/1.303.0030","url":null,"abstract":"In this contribution we present a determination of the strong coupling from a fit of QCD predictions for energy-energy correlation measured in electron-positron collisions at various center-of-mass energies. Experimental data are compared to precise theoretical calculations \u0000incorporating NNLO QCD predictions combined with NNLL resummation in the back-to-back region. Hadronization corrections are assessed using modern shower Monte Carlo programs matched to NLO fixed-order computations. The final result obtained from a global fit is $alpha_S(M_Z)=0.11750pm0.0287(comb.)$.","PeriodicalId":140132,"journal":{"name":"Proceedings of Loops and Legs in Quantum Field Theory — PoS(LL2018)","volume":"57 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-10-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125676386","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
Generalised cuts and Wick rotations 广义切割和维克旋转
Proceedings of Loops and Legs in Quantum Field Theory — PoS(LL2018) Pub Date : 2018-10-02 DOI: 10.22323/1.303.0086
E. Remiddi
{"title":"Generalised cuts and Wick rotations","authors":"E. Remiddi","doi":"10.22323/1.303.0086","DOIUrl":"https://doi.org/10.22323/1.303.0086","url":null,"abstract":"It is proposed that the Wick rotation of the \u0000components of the loop momenta in the directions \u0000not spanned by the physical vectors can offer \u0000an useful and simple tool for the evaluation \u0000of maximally cut graphs.","PeriodicalId":140132,"journal":{"name":"Proceedings of Loops and Legs in Quantum Field Theory — PoS(LL2018)","volume":"33 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-10-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129970972","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
Double Higgs Production in the High Energy Limit 高能极限下的双希格斯产生
Proceedings of Loops and Legs in Quantum Field Theory — PoS(LL2018) Pub Date : 2018-10-02 DOI: 10.22323/1.303.0022
J. Davies, G. Mishima, M. Steinhauser, David Wellmann
{"title":"Double Higgs Production in the High Energy Limit","authors":"J. Davies, G. Mishima, M. Steinhauser, David Wellmann","doi":"10.22323/1.303.0022","DOIUrl":"https://doi.org/10.22323/1.303.0022","url":null,"abstract":"In this talk we summarize our work on NLO QCD corrections to the amplitude for double-Higgs boson production in the gluon fusion channel. We describe our setup to reduce the Feynman integrals of the amplitude to a minimal set of master integrals, and how we compute them. Finally we remark on how so-called uniformly transcendental integrals can be identified in the context of expansion by regions, which we have used extensively in our computation of boundary conditions for systems of differential equations for the master integrals.","PeriodicalId":140132,"journal":{"name":"Proceedings of Loops and Legs in Quantum Field Theory — PoS(LL2018)","volume":"44 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-10-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130488584","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
Gross-Neveu-Yukawa Models at Four Loops Gross-Neveu-Yukawa模特在四圈
Proceedings of Loops and Legs in Quantum Field Theory — PoS(LL2018) Pub Date : 2018-10-02 DOI: 10.22323/1.303.0071
N. Zerf
{"title":"Gross-Neveu-Yukawa Models at Four Loops","authors":"N. Zerf","doi":"10.22323/1.303.0071","DOIUrl":"https://doi.org/10.22323/1.303.0071","url":null,"abstract":"In this contribution we report on the perturbative determination of $beta$-functions and anomalous dimensions for the chiral Ising, chiral XY and chiral Heisenberg Gross-Neveu-Yukawa model \u0000around $D=4$ dimensions at four loops and the first Pad'e extrapolation of critical exponents at non-trivial, infrared stable fixed points to $D=3$ to this order. \u0000This talk is based on Ref.~cite{Zerf:2017zqi}.","PeriodicalId":140132,"journal":{"name":"Proceedings of Loops and Legs in Quantum Field Theory — PoS(LL2018)","volume":"54 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-10-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124036023","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
3-loop coupling for hot gauge theory 热规理论的三环耦合
Proceedings of Loops and Legs in Quantum Field Theory — PoS(LL2018) Pub Date : 2018-10-02 DOI: 10.22323/1.303.0048
Y. Schröder
{"title":"3-loop coupling for hot gauge theory","authors":"Y. Schröder","doi":"10.22323/1.303.0048","DOIUrl":"https://doi.org/10.22323/1.303.0048","url":null,"abstract":"This talk offers a brief review of the determination of coupling constants in the framework of dimensionally reduced effective field theories for thermal QCD, specializing on its gluonic sector. Interestingly, higher-order operators that go beyond the usual super-renormalizable truncation of the effective theory need to be considered when matching parameters at three loops.","PeriodicalId":140132,"journal":{"name":"Proceedings of Loops and Legs in Quantum Field Theory — PoS(LL2018)","volume":"34 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-10-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117028550","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
Precision calculations in BSM theories — Higgs mass and Muon $g − 2$ BSM理论的精确计算-希格斯质量和μ子g−2
Proceedings of Loops and Legs in Quantum Field Theory — PoS(LL2018) Pub Date : 2018-10-02 DOI: 10.22323/1.303.0025
D. Stoeckinger, A. Cherchiglia, H. Stöckinger-Kim, Josua Unger
{"title":"Precision calculations in BSM theories — Higgs mass and Muon $g − 2$","authors":"D. Stoeckinger, A. Cherchiglia, H. Stöckinger-Kim, Josua Unger","doi":"10.22323/1.303.0025","DOIUrl":"https://doi.org/10.22323/1.303.0025","url":null,"abstract":"Two recent results in the field of BSM precision \u0000 calculations are reviewed: (1) For 3-loop calculations of the MSSM \u0000 Higgs mass, the problem of regularization is considered. It is \u0000 proven that regularization by dimensional reduction is consistent with supersymmetry for such \u0000 calculations in the gaugeless limit. (2) The general 2-Higgs doublet \u0000 model and the muon (g-2) is considered. Constraints on the \u0000 possible values of \u0000 Yukawa couplings derived. It is then shown that the \u0000 current deviation in the muon (g-2) can be explained in a small \u0000 but interesting part of the 2-Higgs doublet model parameter space.","PeriodicalId":140132,"journal":{"name":"Proceedings of Loops and Legs in Quantum Field Theory — PoS(LL2018)","volume":"24 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-10-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127058000","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
Cuts and Feynman amplitudes beyond polylogarithms 超越多对数的切割和费曼振幅
Proceedings of Loops and Legs in Quantum Field Theory — PoS(LL2018) Pub Date : 2018-10-02 DOI: 10.22323/1.303.0062
L. Tancredi, Johannes Broedel, C. Duhr, F. Dulat, B. Penante, A. Primo
{"title":"Cuts and Feynman amplitudes beyond polylogarithms","authors":"L. Tancredi, Johannes Broedel, C. Duhr, F. Dulat, B. Penante, A. Primo","doi":"10.22323/1.303.0062","DOIUrl":"https://doi.org/10.22323/1.303.0062","url":null,"abstract":"In this contribution to the proceedings of Loops and Legs in Quantum Field Theory 2018, we discuss some recent developments in the calculation of multiloop Feynman integrals which evaluate to functions beyond multiple polylogarithms.","PeriodicalId":140132,"journal":{"name":"Proceedings of Loops and Legs in Quantum Field Theory — PoS(LL2018)","volume":"343 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-10-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122146362","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
Properties of scattering forms for Yang-Mills amplitudes 杨-米尔斯振幅散射形式的性质
Proceedings of Loops and Legs in Quantum Field Theory — PoS(LL2018) Pub Date : 2018-10-02 DOI: 10.22323/1.303.0078
L. Cruz, Alexander Kniss, S. Weinzierl
{"title":"Properties of scattering forms for Yang-Mills amplitudes","authors":"L. Cruz, Alexander Kniss, S. Weinzierl","doi":"10.22323/1.303.0078","DOIUrl":"https://doi.org/10.22323/1.303.0078","url":null,"abstract":"In this talk we introduce the properties of scattering forms on the compactified moduli space of Riemann spheres with $n$ marked points. These differential forms are $text{PSL}(2,mathbb{C})$ invariant, their intersection numbers correspond to scattering amplitudes as recently proposed by Mizera. All singularities are at the boundary of the moduli space and each singularity is logarithmic. In addition, each \u0000residue factorizes into two differential forms of lower points.","PeriodicalId":140132,"journal":{"name":"Proceedings of Loops and Legs in Quantum Field Theory — PoS(LL2018)","volume":"163 6","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-10-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"120867451","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
Non-planar two-loop Feynman integrals contributing to Higgs plus jet production 非平面双环费曼积分对希格斯加射流产生的贡献
Proceedings of Loops and Legs in Quantum Field Theory — PoS(LL2018) Pub Date : 2018-10-02 DOI: 10.22323/1.303.0076
H. Frellesvig, R. Bonciani, V. Duca, J. Henn, F. Moriello, V. Smirnov
{"title":"Non-planar two-loop Feynman integrals contributing to Higgs plus jet production","authors":"H. Frellesvig, R. Bonciani, V. Duca, J. Henn, F. Moriello, V. Smirnov","doi":"10.22323/1.303.0076","DOIUrl":"https://doi.org/10.22323/1.303.0076","url":null,"abstract":"This is a contribution to the proceedings of the 2018 \"Loops and Legs\" conference. It is based on a talk by HF on ongoing work on the non-planar Feynman integrals contributing to Higgs + jet production at Next-to Leading order in QCD, retaining the complete dependence on the mass of the top-quark. The various non-planar sectors are discussed along with the elliptic structures that appear.","PeriodicalId":140132,"journal":{"name":"Proceedings of Loops and Legs in Quantum Field Theory — PoS(LL2018)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-10-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130379628","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
Two-loop integrals for $μe$ scattering $μe$散射的双环积分
Proceedings of Loops and Legs in Quantum Field Theory — PoS(LL2018) Pub Date : 2018-10-02 DOI: 10.22323/1.303.0027
A. Primo
{"title":"Two-loop integrals for $μe$ scattering","authors":"A. Primo","doi":"10.22323/1.303.0027","DOIUrl":"https://doi.org/10.22323/1.303.0027","url":null,"abstract":"We report on the analytic evaluation of the full set of two-loop four-point master integrals required for the determination of next-to-next-to-leading order corrections to $mu e$-scattering in Quantum Electrodynamics. The results are obtained in the massless electron approximation and they retain full dependence on the muon mass. The considered integrals are also relevant for the crossing related process $e^+ e^-$ $to mu^+ mu^-$, as well as for QCD corrections to the $t{bar t}$-production at hadron colliders.","PeriodicalId":140132,"journal":{"name":"Proceedings of Loops and Legs in Quantum Field Theory — PoS(LL2018)","volume":"36 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-10-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130479595","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
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