ZEU-THEO

Latest additions:
2018-01-19
13:34
OpenAccess [PUBDB-2018-00697] Report/Journal Article
; ; ; et al
The two-mass contribution to the three-loop pure singlet operator matrix element
[DESY-17-195; DO-TH-17-32; arXiv:1711.06717] ddc:530
We present the two-mass QCD contributions to the pure singlet operator matrix element at three loop order in x-space. These terms are relevant for calculating the structure function $F_2(x,Q^2)$ at $O(\alpha_s^3)$ as well as for the matching relations in the variable flavor number scheme and the heavy quark distribution functions at the same order. [...]
OpenAccess: Download fulltextPDF Download fulltextPDF (PDFA);

Detailed record - Similar records
2018-01-15
15:08
arXiv [PUBDB-2018-00650] Journal Article/Report/Contribution to a conference proceedings
; ; ; et al
Heavy quark form factors at two loops in perturbative QCD
[DESY-17-188, DO-TH 17/31, TTK-17-36, NIKHEF 2017-059]
XLI International Conference of Theoretical Physics "Matter to the Deepest", Meeting locationPodlesice, Poland, 3 Sep 2017 - 8 Sep 20172017-09-032017-09-08 Acta physica Polonica / B / Proceedings supplement 48(12), 2155-2166 (2017) [DOI:10.5506/APhysPolB.48.2155]  GO
ddc:530
We present the results for heavy quark form factors at two-loop order in perturbative QCD for different currents, namely vector, axial-vector, scalar and pseudo-scalar currents, up to second order in the dimensional regularization parameter. We outline the necessary computational details, ultraviolet renormalization and corresponding universal infrared structure..
Restricted: Download fulltextPDF Download fulltextPDF (PDFA); External link: Download fulltextFulltext

Detailed record - Similar records
2018-01-15
14:52
arXiv [PUBDB-2018-00649] Journal Article/Report/Contribution to a conference proceedings
; ;
Scalar one-loop vertex integrals as meromorphic functions of space-time dimension $d$
[KW 17-002, DESY 17-186, DO-TH 17/29]
XLI International Conference of Theoretical Physics “Matter to the Deepest”,, Meeting locationPodlesice, Poland, 3 Sep 2017 - 8 Sep 20172017-09-032017-09-08 Acta physica Polonica / B / Proceedings supplement 48(12), 2313-2320 (2017) [10.5506/APhysPolB.48.2313]  GO
ddc:530
Representations are derived for the basic scalar one-loop vertex Feynman integrals as meromorphic functions of the space-time dimension $d$ in terms of (generalized) hypergeometric functions $_2F_1$ and $F_1$. Values at asymptotic or exceptional kinematic points as well as expansions around the singular points at $d=4+2n$, $n$ non-negative integers, may be derived from the representations easily. [...]
Restricted: Download fulltextPDF Download fulltextPDF (PDFA);

Detailed record - Similar records
2018-01-15
08:33
OpenAccess [PUBDB-2018-00635] Preprint/Report
; ; ; et al
The Heavy Quark Form Factors at Two Loops
[DESY-17-102; DO-TH 17/16; Nikhef 2017-063; TTK-17-44; arXiv:1712.09889]
 GO
We compute the two-loop QCD corrections to the heavy quark form factors in case of the vector, axial-vector, scalar and pseudo-scalar currents up to second order in the dimensional parameter $\epsilon = (4-D)/2$. These terms are required in the renormalization of the higher order corrections to these form factors..
OpenAccess: Download fulltextPDF Download fulltextPDF (PDFA);

Detailed record - Similar records
2018-01-11
16:31
arXiv [PUBDB-2018-00554] Report/Journal Article
; ; ; et al
Extracting the top-quark running mass using $t\bar{t} + \hbox {1-jet}$ events produced at the Large Hadron Collider
[HU-EP-17-05; LAL-17-034; DESY-17-053; arXiv:1704.00540] ddc:530
We present the calculation of the next-to-leading order QCD corrections for top-quark pair production in association with an additional jet at hadron colliders, using the modified minimal subtraction scheme to renormalize the top-quark mass. The results are compared to measurements at the Large Hadron Collider run I. [...]
Restricted: Download fulltextPDF Download fulltextPDF (PDFA);

Detailed record - Similar records
2018-01-11
13:00
OpenAccess [PUBDB-2018-00474] Report/Journal Article
; ; ; et al
Addendum to “Charm and bottom quark masses: An update”
[DESY-17-152; FR-PHENO-2017-018; IPPP-17-72; TTP17-039; arXiv:1710.04249] ddc:530
We update the experimental moments for the charm quark as computed in [J. H. [...]
OpenAccess: PRD96(2017)116007 - Download fulltextPDF Download fulltextPDF (PDFA); PhysRevD.96.116007 - Download fulltextPDF Download fulltextPDF (PDFA);

Detailed record - Similar records
2018-01-11
10:21
OpenAccess [PUBDB-2018-00428] Report/Journal Article
; ; ; et al
Three Loop Massive Operator Matrix Elements and Asymptotic Wilson Coefficients with Two Different Masses
[DESY-14-019; DO-TH-15-08; arXiv:1705.07030] ddc:530
Starting at 3-loop order, the massive Wilson coefficients for deep-inelastic scattering and the massive operator matrix elements describing the variable flavor number scheme receive contributions of Feynman diagrams carrying quark lines with two different masses. In the case of the charm and bottom quarks, the usual decoupling of one heavy mass at a time no longer holds, since the ratio of the respective masses, $η = mc^{2}_{c}/mb^{2}_{b}∼$ 1/10 , is not small enough. [...]
OpenAccess: Download fulltextPDF Download fulltextPDF (PDFA);

Detailed record - Similar records
2018-01-10
09:38
Embargoed OpenAccess [PUBDB-2018-00306] Journal Article

On multiple zeta values of even arguments
ddc:510
Published on 2016-10-04. Available in OpenAccess from 2017-10-04.: Download fulltextPDF Download fulltextPDF (PDFA); Restricted: Download fulltextPDF Download fulltextPDF (PDFA);

Detailed record - Similar records
2017-12-20
14:41
OpenAccess [PUBDB-2017-13874] Journal Article
; ;
Strange sea determination from collider data
ddc:530
We consider determinations of the strange sea in the nucleon based on QCD analyses of data collected at the LHC with focus on the recent high-statistics ATLAS measurement of the W$^±$- and Z-boson production. We study the effect of different functional forms for parameterization of the parton distribution functions and the combination of various data sets in the analysis [...]
OpenAccess: Download fulltextPDF Download fulltextPDF (PDFA);

Detailed record - Similar records
2017-12-20
14:21
OpenAccess [PUBDB-2017-13869] Contribution to a conference proceedings

Four-loop mass and field renormalization in the on-shell scheme and renormalons
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 34 pp. (2017) [10.3204/PUBDB-2017-13869]  GO
OpenAccess: Download fulltextPDF Download fulltextPDF (PDFA);

Detailed record - Similar records