SCOAP3 Repository 7 records found  Search took 0.02 seconds. 
1. The unpolarized two-loop massive pure singlet Wilson coefficients for deep-inelastic scattering / Blümlein, J. ; De Freitas, A. ; Raab, C.G. ; Schönwald, K.
We calculate the massive two–loop pure singlet Wilson coefficients for heavy quark production in the unpolarized case analytically in the whole kinematic region and derive the threshold and asymptotic expansions. [...]
Published in Nuclear Physics B 945 (2019) 10.1016/j.nuclphysb.2019.114659
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2. The O ( α 2 ) initial state QED corrections to e + e − annihilation to a neutral vector boson revisited / Blümlein, J. ; De Freitas, A. ; Raab, C.G. ; Schönwald, K.
We calculate the non-singlet, the pure singlet contribution, and their interference term, at O(α2) due to electron-pair initial state radiation to e+e− annihilation into a neutral vector boson in a direct analytic computation without any approximation. [...]
Published in Physics letters B 791 (2019) 206-209 10.1016/j.physletb.2019.02.038
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3. The variable flavor number scheme at next-to-leading order / Blümlein, J. ; De Freitas, A. ; Schneider, C. ; Schönwald, K.
We present the matching relations of the variable flavor number scheme at next-to-leading order, which are of importance to define heavy quark partonic distributions for the use at high energy colliders such as Tevatron and the LHC. [...]
Published in Physics letters B (2018) 10.1016/j.physletb.2018.05.054
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4. The two-mass contribution to the three-loop gluonic operator matrix element Agg,Q(3) / Ablinger, J. ; Blümlein, J. ; De Freitas, A. ; Goedicke, A. ; et al
We calculate the two-mass QCD contributions to the massive operator matrix element Agg,Q at O(αs3) in analytic form in Mellin N - and z -space, maintaining the complete dependence on the heavy quark mass ratio. [...]
Published in Nuclear Physics B (2018) 10.1016/j.nuclphysb.2018.04.023
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5. The two-mass contribution to the three-loop pure singlet operator matrix element / Ablinger, J. ; Blümlein, J. ; De Freitas, A. ; Schneider, C. ; et al
We present the two-mass QCD contributions to the pure singlet operator matrix element at three loop order in x -space. [...]
Published in Nuclear Physics B (2017) 10.1016/j.nuclphysb.2017.12.018
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6. Double hard scattering without double counting / Diehl, Markus ; Gaunt, Jonathan ; Schönwald, Kay
Double parton scattering in proton-proton collisions includes kinematic regions in which two partons inside a proton originate from the perturbative splitting of a single parton. [...]
Published in JHEP 1706 (2017) 083 10.1007/JHEP06(2017)083 arXiv:1702.06486
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7. Leptoquark flavor patterns & B decay anomalies / Hiller, Gudrun ; Loose, Dennis ; Schönwald, Kay
Flavor symmetries that explain masses and mixings of the standard model fermions dictate flavor patterns for the couplings of scalar and vector leptoquarks to the standard model fermions. [...]
Published in JHEP 1612 (2016) 027 10.1007/JHEP12(2016)027 arXiv:1609.08895
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2 Schönwald, Kay
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