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2026-03-31
04:16
Heavy quark masses from step-scaling / Kuberski, Simon ; Conigli, Alessandro ; Fritzsch, Patrick ; Gérardin, Antoine ; Heitger, Jochen ; Herdoíza, Gregorio ; Pena, Carlos ; Simma, Hubert ; Sommer, Rainer (Humboldt U., Berlin)
We present a determination of the charm- and bottom-quark masses using the heavy-quark step-scaling strategy. [...]
CERN-TH-2026-068 ; IFT-UAM/CSIC-26-34 ; MS-TP-26-11 ; arXiv:2603.25295. - 10.
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2026-03-27
06:07
Ground-State Extraction of Heavy-Light Meson Semileptonic Decay Form Factors / D'Anna, A. (Madrid, IFT ; Madrid, Autonoma U.) ; Conigli, A. (Mainz U. ; Darmstadt, GSI) ; Fritzsch, P. (Trinity Coll., Dublin) ; Gérardin, A. (Marseille, CPT) ; Heitger, J. (Munster U., ITP) ; Herdoíza, G. (Madrid, IFT ; Madrid, Autonoma U.) ; Husung, N. (Madrid, IFT ; Madrid, Autonoma U. ; CERN) ; Kuberski, S. (CERN) ; Pena, C. (Madrid, IFT ; Madrid, Autonoma U.) ; Simma, H. (NIC, Zeuthen)
We discuss the extraction of heavy-light pseudo-scalar to light pseudo-scalar decay form factors from finite time correlation functions. We place particular emphasis on the contamination from excited states employing summed ratios and input from chiral perturbation theory. [...]
arXiv:2603.24491; CERN-TH-2026-057; IFT-UAM/CSIC-26-37; MS-TP-26-10.- 2026-03-25 - 11 p. - Published in : PoS: LATTICE2025 (2026) , pp. 246 Fulltext: PDF;
In : 42th International Symposium on Lattice Field Theory (Lattice 2025), Mumbai, India, 2 - 8 Nov 2025, pp.246

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2026-03-26
04:57
A Conformal Bridge for the Light Transform of QCD Correlation Functions / Chen, Hao (MIT, Cambridge, CTP) ; Monni, Pier Francesco (CERN) ; Pang, Zhaoyan (Peking U.) ; Vita, Gherardo (CERN) ; Zhu, Hua Xing (Peking U. ; Peking U., CHEP)
Understanding the link between correlation functions (CFs) of local operators and measurable collider correlators has emerged as a new opportunity in the study of gauge theory dynamics at colliders. [...]
arXiv:2603.22388 ; MIT-CTP 6016 ; CERN-TH-2026-005. - 5.
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2026-03-26
04:45
Slow-down of expanding bubbles in the early Universe / Bhusal, Nabeen (DESY) ; Blasi, Simone (DESY) ; Konstandin, Thomas (DESY) ; Perboni, Enrico (DESY) ; van de Vis, Jorinde (CERN)
We study slow-down effects for bubbles formed in a cosmological first-order phase transition (PT) focusing on deflagrations and hybrids, where the bubble wall is preceded by a shockwave of heated plasma. [...]
arXiv:2603.22397 ; CERN-TH-2026-058 ; DESY-26-040. - 34.
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2026-03-26
04:16
What does it take to have $N_{\rm eff} < 3$ at CMB times? / Escudero, Miguel (CERN) ; Ovchynnikov, Maksym (CERN) ; Weiner, Neal (New York U., CCPP)
The vast majority of extensions of the Standard Model affecting the number of effective relativistic neutrino species ($N_{\rm eff}$) do so additively, namely, they enhance this quantity with some light state contributing to dark radiation. [...]
CERN-TH-2026-056 ; arXiv:2603.22391. - 11.
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2026-03-20
04:17
The gravitational S-matrix from the path integral: asymptotic symmetries and soft theorems / Isen, Jack (UCLA, Los Angeles (main)) ; Kraus, Per (UCLA, Los Angeles (main)) ; Monten, Ruben (CERN) ; Myers, Richard M. (Amsterdam U.)
We extend a previously developed formulation of the S-matrix, based on a path integral with asymptotic boundary conditions, to include gravity. [...]
CERN-TH-2026-044 ; arXiv:2603.17045. - 59.
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2026-03-20
04:17
$K π$ scattering as a step towards $B \to K^* \ell^+ \ell^-$ from Lattice QCD / Erben, Felix (CERN) ; Black, Matthew (Edinburgh U.) ; Boyle, Peter (Brookhaven ; Edinburgh U.) ; Di Carlo, Matteo (CERN) ; Gülpers, Vera (Edinburgh U.) ; Hansen, Maxwell T. (Edinburgh U.) ; Lachini, Nelson Pitanga (Cambridge U., DAMTP) ; Mukherjee, Rajnandini (Edinburgh U.) ; Portelli, Antonin (Edinburgh U.) ; Tsang, J. Tobias (Liverpool U., Dept. Math.)
Rare $b\to s\ell^+\ell^-$ decays provide some of the most sensitive tests of the Standard Model and require precise and systematically improvable hadronic input from lattice QCD. [...]
arXiv:2603.17900 ; CERN-TH-2026-053. - 10 p, 10.
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2026-03-19
04:06
Shocks from Exploding Primordial Black Holes in the Early Universe / Vanvlasselaer, Miguel (Brussels U., IIHE ; U. Barcelona (main)) ; Trifinopoulos, Sokratis (MIT ; CERN ; Zurich U.) ; Klipfel, Alexandra P. (MIT) ; Kaiser, David I. (MIT)
We investigate how Hawking radiation from low-mass primordial black holes deposits energy into the early-universe plasma and show that the resulting phenomena are hydrodynamic rather than purely diffusive. [...]
CERN-TH-2026-048 ; MIT-CTP/5978 ; arXiv:2603.15746. - 34.
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2026-03-19
04:01
The photon-energy spectrum in $B\to X_sγ$ to N$^3$LO: light-fermion and large-$N_{\rm c}$ corrections / Fael, Matteo (U. Padua (main) ; INFN, Padua) ; Lange, Fabian (Zurich U. ; PSI, Villigen) ; Schönwald, Kay (CERN) ; Steinhauser, Matthias (KIT, Karlsruhe)
We calculate the photon-energy spectrum of the inclusive radiative decay $B\to X_sγ$, induced by the electromagnetic dipole operator $O_7$, to next-to-next-to-next-to-leading order and consider the complete corrections for light fermions, for the contributions with two closed massive fermion loops, and for the limit of large QCD colour factors $N_{\rm c}$ in the remaining part. [...]
CERN-TH-2026-049 ; P3H-26-018 ; TTP26-007 ; ZU-TH 11/26 ; arXiv:2603.15751. - 38.
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2026-03-19
04:01
$gg \to ZH$ at NLO matched to parton showers with ggxy and POWHEG / Davies, Joshua (U. Liverpool (main)) ; Schönwald, Kay (CERN) ; Steinhauser, Matthias (KIT, Karlsruhe) ; Stremmer, Daniel (KIT, Karlsruhe)
We implement the recently-calculated analytic expressions for the next-to-leading order QCD corrections to $gg\to ZH$ in ggxy. [...]
CERN-TH-2026-051 ; P3H-26-019 ; TTP26-008 ; arXiv:2603.15762. - 23.
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