NNLL soft and Coulomb resummation for squark and gluino production at the LHC

被引:14
|
作者
Beneke, M. [1 ]
Piclum, J. [2 ,3 ]
Schwinn, C. [4 ]
Wever, C. [5 ,6 ,7 ]
机构
[1] Tech Univ Munich, Phys Dept T31, James Franck Str 1, D-85748 Garching, Germany
[2] Univ Siegen, Nat Wissensch Tech Fak, Theoret Phys 1, Walter Flex Str 3, D-57068 Siegen, Germany
[3] Univ Bern, Inst Theoret Phys, Albert Einstein Ctr Fundamental Phys, Sidlerstr 5, CH-3012 Bern, Switzerland
[4] Rhein Westfal TH Aachen, Inst Theoret Teilchenphys & Kosmol, Sommerfeldstr 16, D-52056 Aachen, Germany
[5] NCSR Demokritos, Inst Nucl Phys, Patriarchou Gregoriou E & Neapoleos St 27, GR-15310 Aghia Paraskevi, Greece
[6] Karlsruhe Inst Technol, Inst Theoret Particle Phys TTP, Engesserstr 7, D-76128 Karlsruhe, Germany
[7] Karlsruhe Inst Technol, Inst Nucl Phys IKP, Hermann von Helmholtz Pl 1, D-76344 Eggenstein Leopoldshafen, Germany
来源
关键词
NLO Computations; Supersymmetry Phenomenology; PRODUCTION CROSS-SECTIONS; PARTON SHOWERS; THRESHOLD;
D O I
10.1007/JHEP10(2016)054
中图分类号
O412 [相对论、场论]; O572.2 [粒子物理学];
学科分类号
摘要
We present predictions for the total cross sections for pair production of squarks and gluinos at the LHC including a combined NNLL resummation of soft and Coulomb gluon effects. We derive all terms in the NNLO cross section that are enhanced near the production threshold, which include contributions from spin-dependent potentials and so-called annihilation corrections. The NNLL corrections at root s = 13 TeV range from up to 20% for squark-squark production to 90% for gluino pair production relative to the NLO results and reduce the theoretical uncertainties of the perturbative calculation to the 10% level. Grid files with our numerical results are publicly available [1].
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页数:42
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