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2024-11-28
04:29
Renormalisation group evolution of the shape function $g_{17}$ in $\bar{B}\to X_s \gamma$ and $\bar{B} \to X_s \ell^+\ell^-$ at subleading power / Bartocci, Riccardo (U. Mainz, PRISMA ; Mainz U., Inst. Phys.) ; Böer, Philipp (CERN) ; Hurth, Tobias (U. Mainz, PRISMA ; Mainz U., Inst. Phys.)
We derive and solve the renormalisation-group (RG) equation of the shape function $g_{17}(\omega,\omega_1;\mu)$, which appears at subleading power in the factorization of the inclusive decays $\bar{B} \to X_s \gamma$ and $\bar B \to X_s \ell^+\ell^-$. [...]
MITP/24-078 ; CERN-TH-2024-191 ; arXiv:2411.16634. - 36.
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2024-11-23
04:25
Bounds on the bubble wall velocity / Ai, Wen-Yuan (King's Coll. London) ; Laurent, Benoit (McGill U., Montreal (main)) ; van de Vis, Jorinde (CERN)
Determining the bubble wall velocity in first-order phase transitions is a challenging task, requiring the solution of (coupled) equations of motion for the scalar field and Boltzmann equations for the particles in the plasma. [...]
CERN-TH-2024-198 ; KCL-PH-TH/2024-57 ; arXiv:2411.13641. - 47.
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2024-11-22
04:22
A generalized picture of colour decoherence in dense QCD media / Abreu, Samuel (CERN ; U. Edinburgh, Higgs Ctr. Theor. Phys.) ; Mayo López, Xoán (Santiago de Compostela U., IGFAE) ; Milhano, Guilherme (LIP, Lisbon ; Lisbon, IST) ; Soto-Ontoso, Alba (Granada U., Theor. Phys. Astrophys.)
We revisit the calculation of the soft gluon emission probability off a colour-singlet $q\bar q$ system that evolves in a quark-gluon plasma. [...]
arXiv:2410.24135 ; CERN-TH-2024-185. - 34.
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2024-11-22
04:20
The two-loop fully differential soft function for $Q\bar{Q}V$ production at lepton colliders / Liu, Ze Long (Beijing, Inst. High Energy Phys.) ; Monni, Pier Francesco (CERN)
We consider the production of a pair of heavy quarks $Q\bar{Q}$ in association with a generic colour singlet system $V$ at lepton colliders, and present the first analytic calculation of the two-loop soft function differential in the total momentum of the real radiation. [...]
CERN-TH-2024-203 ; arXiv:2411.13466. - 15.
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2024-11-20
04:02
A Cell Resampler study of Negative Weights in Multi-jet Merged Samples / Andersen, Jeppe R. (Durham U. (main) ; CERN) ; Cueto, Ana (U. Autonoma, Madrid (main)) ; Jones, Stephen P. (Durham U. (main)) ; Maier, Andreas (Barcelona, IFAE ; Barcelona, Autonoma U.)
We study the use of cell resampling to reduce the fraction of negatively weighted Monte Carlo events in a generated sample typical of that used in experimental analyses. [...]
CERN-TH-2024-200 ; IPPP/24/73 ; arXiv:2411.11651. - 11.
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2024-11-15
04:01
Strange and charm quark contributions to the muon anomalous magnetic moment in lattice QCD with twisted-mass fermions / Extended Twisted Mass Collaboration (ETMC) Collaboration
We present a lattice calculation of the Hadronic Vacuum Polarization (HVP) contribution of the strange and charm quarks to the anomalous magnetic moment of the muon in isospin symmetric QCD. [...]
CERN-TH-2024-197 ; arXiv:2411.08852. - 33.
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2024-11-14
07:09
The hadronic vacuum polarization contribution to the muon $g-2$ at long distances / Djukanovic, Dalibor (Helmholtz Inst., Mainz ; Darmstadt, GSI) ; von Hippel, Georg (U. Mainz, PRISMA) ; Kuberski, Simon (CERN) ; Meyer, Harvey B. (Helmholtz Inst., Mainz ; Darmstadt, GSI ; U. Mainz, PRISMA) ; Miller, Nolan (Helmholtz Inst., Mainz ; Darmstadt, GSI) ; Ottnad, Konstantin (U. Mainz, PRISMA) ; Parrino, Julian (U. Mainz, PRISMA) ; Risch, Andreas (Wuppertal U.) ; Wittig, Hartmut (Helmholtz Inst., Mainz ; Darmstadt, GSI ; U. Mainz, PRISMA)
We present our lattice QCD result for the long-distance part of the hadronic vacuum polarization contribution, $(a_\mu^{\rm hvp})^{\rm LD}$, to the muon $g-2$ in the time-momentum representation. [...]
CERN-TH-2024-196 ; MITP-24-080 ; arXiv:2411.07969. - 55.
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2024-11-14
04:05
Wormhole-Induced ALP Dark Matter / Cheong, Dhong Yeon (IPAP, Seoul ; Yonsei U.) ; Hamaguchi, Koichi (Tokyo U. ; Tokyo U., IPMU) ; Kanazawa, Yoshiki (Tokyo U.) ; Lee, Sung Mook (CERN) ; Nagata, Natsumi (Tokyo U.) ; Park, Seong Chan (IPAP, Seoul ; Yonsei U. ; Korea Inst. Advanced Study, Seoul)
Non-perturbative gravitational effects induce explicit global symmetry breaking terms within axion models. [...]
CERN-TH-2024-195 ; arXiv:2411.07713. - 25.
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2024-11-13
04:14
wilson: A package for renormalization group running in the SMEFT with Sterile Neutrinos / Aebischer, Jason (CERN) ; Kapoor, Tejhas (IJCLab, Orsay) ; Kumar, Jacky (Los Alamos)
Sterile neutrinos are well-motivated beyond the Standard Model (BSM) particles. [...]
CERN-TH-2024-186 ; LA-UR-24-31845 ; arXiv:2411.07220. - 14.
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2024-11-12
04:08
Combination of aN$^3$LO PDFs and implications for Higgs production cross-sections at the LHC / MSHT Collaboration
We discuss how the two existing approximate N$^3$LO (aN$^3$LO) sets of parton distributions (PDFs) from the MSHT20 and NNPDF4.0 series can be combined for LHC phenomenology, both in the pure QCD case and for the QCD$\otimes$QED sets that include the photon PDF. [...]
arXiv:2411.05373 ; DESY-24-134 ; TIF-UNIMI-2024-17 ; Edinburgh 2024/9 ; CERN-TH-2024-167. - 22.
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