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2021-12-03
08:03
Estimating the thermal photon production rate using lattice QCD / Török, Csaba ; Cè, Marco ; Harris, Tim ; Krasniqi, Ardit ; Meyer, Harvey B. ; Toniato, Arianna
We present results for the photon emission rate determined from the transverse channel vector correlator at fixed spatial momentum using two flavors of dynamical Wilson fermions at $T\sim$250 MeV. We estimate the transverse channel spectral function using the continuum extrapolated correlator by applying various fit ansätze with a smooth matching to the NLO perturbative result. [...]
arXiv:2112.00563; CERN-TH-2021-171.- 2021-12-01 - Published in : PoS: LATTICE2021 (2021) , pp. 172 Fulltext: PDF;
In : 38th International Symposium on Lattice Field Theory, Online, 26 - 30 Jul 2021, pp.172

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2021-12-03
08:02
Deep inelastic scattering off quark-gluon plasma and its photon emissivity / Cè, Marco ; Harris, Tim ; Meyer, Harvey B. ; Toniato, Arianna ; Török, Csaba
The photon emissivity of quark-gluon plasma probes the interactions in the medium and differs qualitatively between a weakly coupled and a strongly coupled plasma in the soft-photon regime. [...]
arXiv:2112.00450 ; CERN-TH-2021-167. - 8 p.
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2021-12-01
04:33
Renormalization $\&$ improvement of the tensor operator for $N_f=3$ QCD in a $\chi$SF setup / Plasencia, Isabel Campos ; Brida, Mattia Dalla ; de Divitiis, Giulia Maria ; Lytle, Andrew ; Papinutto, Mauro ; Pirelli, Ludovica ; Vladikas, Anastassios
We present preliminary results of the non-perturbative renormalization group (RG) running of the flavor non-singlet tensor operator. [...]
arXiv:2111.15325 ; CERN-TH-2021-204. - 8 p.
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2021-12-01
04:23
Quark mass RG-running for $N_f$ =3 QCD in a $\chi SF$ setup / Plasencia, Isabel Campos ; Brida, Mattia Dalla ; de Divitiis, Giulia Maria ; Lytle, Andrew ; Papinutto, Mauro ; Pirelli, Ludovica ; Vladikas, Anastassios
We compute the nonperturbative quark mass RG-running in the range $\Lambda_{QCD}\lessapprox\mu\lessapprox M_W$ for $N_f=3$ massless QCD with a mixed action approach: sea quarks are regularised using nonperturbatively $O(a)$-improved Wilson fermions with Schrödinger functional (SF) boundary conditions, employing the configurations of 1802.05243, while valence quarks are regularised using nonperturbatively $O(a)$-improved Wilson fermions with chirally rotated Schrödinger functional boundary conditions ($\chi$SF). [...]
arXiv:2111.15384 ; CERN-TH-2021-205. - 8 p.
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2021-11-29
04:01
Mounting Evidence for the Violation of Lepton Flavor Universality / Crivellin, Andreas (Zurich U. ; PSI, Villigen ; CERN) ; Hoferichter, Martin (Bern U.)
The Standard Model (SM) of particle physics was finalized in its current form in the mid-1970s, and has been extensively tested and confirmed ever since, with the discovery of the Higgs boson in 2012 being the last missing piece. While no new particles have been directly discovered at the Large Hadron Collider (LHC) at CERN so far, precision observables sensitive to quantum effects of new particles have accumulated intriguing hints for physics beyond the SM. [...]
arXiv:2111.12739; CERN-TH-2021-193; PSI-PR-21-26; ZU-TH 55/21.- 2021-11-24 - 3 p. - Published in : Science 374 (2021) 1051 Fulltext: PDF;

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2021-11-27
04:34
Probing multi-particle unitarity with the Landau equations / Correia, Miguel ; Sever, Amit ; Zhiboedov, Alexander
We consider the $2\to 2$ scattering amplitude of identical massive particles. [...]
arXiv:2111.12100 ; CERN-TH-2021-197. - 9 p.
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2021-11-27
04:24
General Analytical Conditions for Inflaton Fragmentation: Quick and Easy Tests for its Occurrence / Kim, Jinsu (CERN) ; McDonald, John (Lancaster U.)
Understanding the physics of inflaton condensate fragmentation in the early Universe is crucial as the existence of fragments in the form of non-topological solitons (oscillons or Q-balls) may potentially modify the evolution of the post-inflation Universe. [...]
arXiv:2111.12474 ; CERN-TH-2021-202. - 9 p.
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2021-11-24
04:21
Master-field simulations of QCD / Fritzsch, P. ; Bulava, J. ; Cè, M. ; Francis, A. ; Lüscher, M. ; Rago, A.
We report on the first master-field simulations of QCD with 2+1 dynamical quark flavours using non-perturbatively improved stabilised Wilson fermions. [...]
arXiv:2111.11544 ; CERN-TH-2021-198. - 9 p.
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2021-11-24
04:18
Likelihood analysis of the flavour anomalies and $g-2$ in the general two Higgs doublet model / Athron, Peter (Nanjing Normal U. ; Monash U.) ; Balazs, Csaba ; Gonzalo, Tomás E. ; Jacob, Douglas ; Mahmoudi, Farvah ; Sierra, Cristian
We present a likelihood analysis of the general two Higgs doublet model, using the most important currently measured flavour observables, in view of the anomalies in charged current tree-level and neutral current one-loop rare decays of $B$ mesons in $b\to c l \overline{\nu}$ and $b\to s\mu^{+}\mu^{-}$ transitions, respectively. [...]
arXiv:2111.10464 ; CERN-TH-2021-194 ; TTK-21-47. - 49 p.
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2021-11-22
08:11
MicroBooNE and the $\nu_e$ Interpretation of the MiniBooNE Low-Energy Excess / Argüelles, C.A. (Harvard U.) ; Esteban, I. (Ohio State U., CCAPP ; Ohio State U.) ; Hostert, M. (Cambridge U., DAMTP ; Perimeter Inst. Theor. Phys. ; Minnesota U. ; Minnesota U., Theor. Phys. Inst.) ; Kelly, K.J. (CERN) ; Kopp, J. (CERN ; Mainz U., Inst. Phys. ; U. Mainz, PRISMA) ; Machado, P.A.N. (Fermilab) ; Martinez-Soler, I. (Harvard U.) ; Perez-Gonzalez, Y.F. (Durham U., IPPP)
A new generation of neutrino experiments is testing the $4.7\sigma$ anomalous excess of electron-like events observed in MiniBooNE. [...]
arXiv:2111.10359 ; CERN-TH-2021-195 ; FERMILAB-PUB-21-618-T ; IPPP/21/50 ; FTPI-MINN-21-23. - 2 p.
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