ZEU-THEO

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2017-12-12
11:23
[PUBDB-2017-13313] Contribution to a conference proceedings
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Heavy Flavor Wilson Coefficients in Deep-Inelastic Scattering: Recent Results
QCD Evolution Workshop, QCD 2017, Meeting locationNewport News, USA , 22 May 2017 - 26 May 20172017-05-222017-05-26 PoS(QCDEV2017)031 (2017)

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2017-12-08
14:53
[PUBDB-2017-13096] Talk (non-conference)

Elliptic Integrals in Higher Loop Calculations: from IBP's to eta-eighted elliptic polylogarithms
KMPB workshop, Meeting locationDESY Zeuthen, 23 Oct 2017 - 23 Oct 20172017-10-232017-10-23

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2017-11-30
15:40
OpenAccess [PUBDB-2017-12620] Contribution to a conference proceedings

$\alpha_{QED}(M_{Z})$ and future prospects with low energy $e^{+}e^−$collider data
FCC-ee Mini-Workshop: "Physics Behind Precision", FCC-ee, Meeting locationGeneva, Switzerland, 2 Feb 2016 - 3 Feb 20162016-02-022016-02-03 session 1, 3.2.2016 (2017) [10.3204/PUBDB-2017-12620]  GO
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2017-11-30
15:27
[PUBDB-2017-12619] Contribution to a conference proceedings
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The massive 3-loop operator matrix elements with two different masses and the generalized VFNS.
13th International Symposium on Radiative Corrections (Applications of Quantum Field Theory to Phenomenology), Meeting locationSt. Gilgen, Austria, 25 Sep 2017 - 29 Sep 20172017-09-252017-09-29 PoS(RADCOR2017)071 (2017)

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2017-11-28
17:00
[PUBDB-2017-12479] Journal Article/Contribution to a conference proceedings
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Heavy quark form factors at two loops in perturbative QCD
Matter To The Deepest: Recent Developments In Physics Of Fundamental Interactions, XLI International Conference of Theoretical Physics, Meeting locationPodlesice, Poland, 3 Sep 2017 - 8 Sep 20172017-09-032017-09-08 Acta physica Polonica / B (2017)  GO
ddc:530
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2017-11-28
16:42
OpenAccess [PUBDB-2017-12477] Report/Journal Article
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Four-loop critical exponents for the Gross-Neveu-Yukawa models
[arXiv:1709.05057] ddc:530
We study the chiral Ising, the chiral XY, and the chiral Heisenberg models at four-loop order with the perturbative renormalization group in 4−ε dimensions and compute critical exponents for the Gross-Neveu-Yukawa fixed points to order O(ε$^4$). Further, we provide Padé estimates for the correlation length exponent, the boson and fermion anomalous dimension, as well as the leading correction to scaling exponent in 2+1 dimensions [...]
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2017-11-28
14:10
OpenAccess [PUBDB-2017-12460] Preprint/Report
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Kira - A Feynman Integral Reduction Program
[HU-EP-17-08; FR-PHENO-2017-14; arXiv:1705.05610]
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In this article, we present a new implementation of the Laporta algorithm to reduce scalar multi-loop integrals-appearing in quantum field theoretic calculations-to a set of master integrals. We extend existing approaches by using an additional algorithm based on modular arithmetic to remove linearly dependent equations from the system of equations arising from integration-by-parts and Lorentz identities. [...]
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2017-11-28
14:04
OpenAccess [PUBDB-2017-12457] Preprint/Report
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Life of $\Pi$
[DESY-17-154; arXiv:1710.03724; ]
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The heavy-quark contribution to the polarisation function $\Pi$ at higher perturbative orders is presently only known approximately. We scrutinise the accuracy of state-of-the-art Padé approximations at three- and four-loop order [...]
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2017-11-28
13:54
OpenAccess [PUBDB-2017-12456] Report/Journal Article
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The five-loop Beta function for a general gauge group and anomalous dimensions beyond Feynman gauge
[DESY-17-142; BI-TP-2017-13; IPPP-17-68; arXiv:1709.07718; ] ddc:530
We focus on a non-abelian gauge field coupled to a single (but general) representation of a family of Nf fermions. By using the same machinery that had allowed us to evaluate the sub-leading large-Nf term of the five-loop Beta function earlier, we here report on a confirmation of the all-Nf result that has in the meantime been published by another group. [...]
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2017-11-28
13:45
OpenAccess [PUBDB-2017-12453] Report/Journal Article
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New Prospects for the Numerical Calculation of Mellin--Barnes Integrals in Minkowskian Kinematics
[arXiv:1704.02288] ddc:530
During the last several years, remarkable progress has been made in numerical calculations of dimensionally regulated multi-loop Feynman diagrams using Mellin–Barnes (MB) representations. The bottlenecks were non-planar diagrams and Minkowskian kinematics. [...]
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