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2020-08-12
05:09
Probing New Physics in Dimension-8 Neutral Gauge Couplings at $e^+e^-$ Colliders / Ellis, John ; He, Hong-Jian ; Xiao, Rui-Qing
Neutral triple gauge couplings (nTGCs) are absent in the standard model effective theory up to dimension-6 operators, but could arise from dimension-8 effective operators. [...]
arXiv:2008.04298 ; KCL-PH-TH/2020-28 ; CERN-TH-2020-076. - 39 p.
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2020-08-12
05:09
From Ji to Jaffe-Manohar orbital angular momentum in Lattice QCD using a direct derivative method / Engelhardt, M. ; Green, J.R. ; Hasan, N. ; Krieg, S. ; Meinel, S. ; Negele, J. ; Pochinsky, A. ; Syritsyn, S.
A Lattice QCD approach to quark orbital angular momentum in the proton based on generalized transverse momentum-dependent parton distributions (GTMDs) is enhanced methodologically by incorporating a direct derivative technique. [...]
CERN-TH-2020-133 ; arXiv:2008.03660. - 12 p.
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2020-08-08
04:34
Correlating $h\to\mu^+\mu^-$ to the Anomalous Magnetic Moment of the Muon via Leptoquarks / Crivellin, Andreas ; Mueller, Dario ; Saturnino, Francesco
Recently, both ATLAS and CMS measured the decay $h\to\mu^+\mu^-$, finding a signal strength with respect to the Standard Model (SM) expectation of $1.2\pm0.6$ and $1.19\substack{+0.41+0.17\\-0.39 -0.16}$, respectively. [...]
arXiv:2008.02643 ; CERN-TH-2020-134 ; PSI-PR-20-12 ; ZU-TH 28/20. - 7 p.
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2020-08-06
05:53
Combining single and double parton scatterings in a parton shower / Cabouat, Baptiste ; Gaunt, Jonathan R.
Double parton scattering (DPS) processes in which there is a perturbative \mbox{``$1\to2$''} splitting in both protons overlap with loop corrections to single parton scattering (SPS). [...]
arXiv:2008.01442 ; MAN/HEP/2020/007 ; CERN-TH-2020-114 ; MCnet-20-18. - 46 p.
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2020-08-06
05:53
Global Electroweak Fit and Vector-Like Leptons in Light of the Cabibbo Angle Anomaly / Crivellin, Andreas ; Kirk, Fiona ; Manzari, Claudio Andrea ; Montull, Marc
The "Cabibbo Angle Anomaly'' (CAA) originates from the disagreement between the CKM elements $V_{ud}$ and $V_{us}$ extracted from superallowed beta and kaon decays, respectively, once compared via CKM unitarity. [...]
arXiv:2008.01113 ; CERN-TH-2020-128 ; PSI-PR-20-11 ; UZ-TH 26/20. - 34 p.
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2020-08-01
05:54
Updated predictions for gravitational waves produced in a strongly supercooled phase transition / Ellis, John ; Lewicki, Marek ; Vaskonen, Ville
We update predictions for the gravitational wave (GW) signal from a strongly supercooled phase transition in an illustrative classically conformal U(1)$_{B-L}$ model. [...]
arXiv:2007.15586 ; KCL-PH-TH/2020-40 ; CERN-TH-2020-129. - 22 p.
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2020-08-01
05:54
The Neutrino Magnetic Moment Portal: Cosmology, Astrophysics, and Direct Detection / Brdar, Vedran ; Greljo, Admir ; Kopp, Joachim ; Opferkuch, Toby
We revisit the physics of neutrino magnetic moments, focusing in particular on the case where the right-handed, or sterile, neutrinos are heavier (up to several MeV) than the left-handed Standard Model neutrinos. [...]
arXiv:2007.15563 ; CERN-TH-2020-130 ; MITP/20-041. - 18 p.
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2020-07-30
05:08
Predicting parton energy loss in small collision systems / Huss, Alexander (CERN) ; Kurkela, Aleksi (CERN) ; Mazeliauskas, Aleksas (CERN) ; Paatelainen, Risto (CERN) ; van der Schee, Wilke (CERN) ; Wiedemann, Urs Achim (CERN)
Medium induced parton energy loss is not conclusively established neither in very peripheral heavy-ion collisions nor in proton-ion collisions. [...]
arXiv:2007.13758 ; CERN-TH-2020-127. - 19 p.
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2020-07-30
05:08
Discovering partonic rescattering in light nucleus collisions / Huss, Alexander (CERN) ; Kurkela, Aleksi (CERN) ; Mazeliauskas, Aleksas (CERN) ; Paatelainen, Risto (CERN) ; van der Schee, Wilke (CERN) ; Wiedemann, Urs Achim (CERN)
We demonstrate that oxygen-oxygen (OO) collisions at the LHC provide unprecedented sensitivity to parton energy loss in a system whose size is comparable to those created in very peripheral heavy-ion collisions [...]
arXiv:2007.13754 ; CERN-TH-2020-126. - 8 p.
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2020-07-29
04:47
Charged Current Drell-Yan Production at N3LO / Duhr, Claude ; Dulat, Falko ; Mistlberger, Bernhard
We present the production cross section for a lepton-neutrino pair at the Large Hadron Collider computed at next-to-next-to-next-to leading order (N3LO) in QCD perturbation theory. [...]
arXiv:2007.13313 ; CERN-TH-2020-121 ; SLAC-PUB-17539. - 22 p.
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