Wed·Dec 8, 2021Wednesday·December 8, 2021

1. 01*

   Renormalization constants of overlap quark bilinear operators from RI/MOM and RI/SMOM scheme

   Fangcheng He🇨🇳 · Yi-Bo Yang🇨🇳

   We calculate the renormalization constants (RCs) of vector, axial, vector scalar, pseudoscalar and tensor quark operators of the overlap valence fermion, on the 11 gauge ensembles with dynamical fermion using either Domain wall fermion~(DWF) action orHighly improved stagger quark~(HISQ) action at lattice spacings from 0.04 fm to 0.20 fm. We find the results under the $\overline{\text{MS}}$ scheme using either the RI/MOM or RI/SMOM scheme are consistent with each other, once the proper $a^2{p}^2$ extrapolation is applied and the systematic uncertainties are estimated cautiously. Our results with different gauge and fermion actions also indicate that the RCs are majorly dependent on the lattice spacing (as the inverse of UV cut-off) rather than the bare gauge coupling used by the gauge action.

   hep-latPoS(2022)·2 citations
2. 02*

   Pion-pole contribution to HLbL from twisted mass lattice QCD at the physical point

   Sebastian Burri🇨🇭 · Constantia Alexandrou🇨🇾 · Simone Bacchio🇨🇾 · Georg Bergner🇩🇪 · Jacob Finkenrath🇨🇾 · Andrew Gasbarro🇨🇭 · Kyriakos Hadjiyiannakou🇨🇾 · Karl Jansen🇩🇪 · Bartosz Kostrzewa🇩🇪 · Giannis Koutsou🇨🇾 · Konstantin Ottnad🇩🇪 · Marcus Petschlies🇩🇪 and 4 other authors

   We report on our computation of the pion transition form factor ${\mathcal{F}}_{P\to {\gamma }^{\ast }{\gamma }^{\ast }}$ from twisted mass lattice QCD in order to determine the numerically dominant light pseudoscalar pole contribution in the hadronic light-by-light scattering contribution to the anomalous magnetic moment of the muon $a_{\mu }=(g-2{)}_{\mu }$. The pion transition form factor is computed directly at the physical point. We present first results for our estimate of the pion-pole contribution with kinematic setup for the pion at rest.

   hep-latPoS(2022)·6 citations
3. 03*

   Three-dimensional $O(N)$-invariant ${\varphi }^4$ models at criticality for $N\ge 4$

   Martin Hasenbusch🇩🇪

   We study the $O(N)$-invariant ${\varphi }^4$ model on the simple cubic lattice by using Monte Carlo simulations. By using a finite size scaling analysis, we obtain accurate estimates for the critical exponents $\nu$ and $\eta$ for $N=4$, $5$, $6$, $8$, $10$, and $12$. We study the model for each $N$ for at least three different values of the parameter $\lambda$ to control leading corrections to scaling. We compare our results with those obtained by other theoretical methods.

   hep-latcond-mat.stat-mechPRB(2022)·28 citations
4. 04*

   Some Recent Results on Renormalization-Group Properties of Quantum Field Theories

   Robert Shrock🇺🇸

   We discuss some higher-loop studies of renormalization-group flows and fixed points in various quantum field theories.

   ↳ hep-thhep-lathep-phSciPost Phys.Proc.(2022)·1 citation
5. 05*

   On transverse momentum broadening in real-time lattice simulations of the glasma and in the weak-field limit

   Andreas Ipp🇦🇹 · David I. Müller🇦🇹 · Daniel Schuh🇦🇹

   In these proceedings, we report on our numerical lattice simulations of partons traversing the boost-invariant, non-perturbative glasma as created at the early stages of collisions at RHIC and LHC. Since these highly energetic partons are produced from hard scatterings during heavy-ion collisions, they are already affected by the first stage of the medium's time evolution, the glasma, which is the pre-equilibrium precursor state of the quark-gluon plasma. We find that partons quickly accumulate transverse momentum up to the saturation momentum during the glasma stage. Moreover, we observe an interesting anisotropy in transverse momentum broadening of partons with larger broadening in the rapidity than in the azimuthal direction. Its origin can be related to correlations among the longitudinal color-electric and color-magnetic flux tubes in the initial state of the glasma. We compare these observations to the semi-analytic results obtained by a weak-field approximation, where we also find such an anisotropy in a parton's transverse momentum broadening.

   ↳ hep-phhep-latnucl-thEPJ Web Conf.(2022)·1 citation

* Reconstructed cohort: no mailing for this day survives in the archive. Papers are grouped by their submission times and arXiv's announcement cut-off, assuming announcement without delay; positions follow identifier order. Validated at ~91% exact-day agreement against the archived era.