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TH Preprints

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2026-04-02
04:05
Baryogenesis from Exploding Primordial Black Holes / Klipfel, Alexandra P. (MIT) ; Vanvlasselaer, Miguel (Brussels U., IIHE ; U. Barcelona (main)) ; Trifinopoulos, Sokratis (MIT ; CERN ; Zurich U.) ; Kaiser, David I. (MIT)
Exploding primordial black holes can source baryon asymmetry soon after the electroweak phase transition, as high-energy Hawking radiation drives ultrarelativistic shocks in the surrounding plasma. [...]
MIT-CTP/6015 ; CERN-TH-2026-078 ; arXiv:2603.29024. - 15.
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2026-04-01
04:34
Two-Loop Spacelike Splitting Amplitudes in Full-Color QCD / Buccioni, Federico (CERN) ; Fang, Hanyu (Shanghai Jiaotong U. ; KLPAC, Shanghai) ; Yan, Kai (Shanghai Jiaotong U. ; KLPAC, Shanghai)
The study of QCD scattering amplitudes in the collinear regime provides crucial insight into the factorization properties of hadronic cross sections. [...]
CERN-TH-2026-066 ; arXiv:2603.27123. - 6.
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2026-04-01
04:29
$\mathfrak{B}$locking Mesogenesis / Baruch, Chaja (Technion) ; Elor, Gilly (Texas U.) ; Goldberg, Jared M. (Technion) ; Shtaif, Omer (Technion) ; Soreq, Yotam (Technion ; CERN)
Mechanisms of Mesogenesis generate the baryon asymmetry and dark matter of the Universe through late-time decays of Standard Model mesons into baryons and dark matter states. [...]
CERN-TH-2026-071 ; arXiv:2603.28330. - 10.
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2026-03-31
04:16
Heavy quark masses from step-scaling / Kuberski, Simon (CERN) ; Conigli, Alessandro (Helmholtz Inst., Mainz ; Darmstadt, GSI) ; Fritzsch, Patrick (Trinity Coll., Dublin) ; Gérardin, Antoine (Marseille, CPT) ; Heitger, Jochen (Munster U., ITP) ; Herdoíza, Gregorio (U. Autonoma, Madrid (main) ; CSIC, Madrid) ; Pena, Carlos (U. Autonoma, Madrid (main) ; CSIC, Madrid) ; Simma, Hubert (DESY) ; Sommer, Rainer (DESY ; Humboldt U., Berlin (main))
We present a determination of the charm- and bottom-quark masses using the heavy-quark step-scaling strategy. [...]
arXiv:2603.25295 ; CERN-TH-2026-068 ; IFT-UAM/CSIC-26-34 ; MS-TP-26-11. - 10.
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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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