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CERN-TH

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2026-04-03
05:03
Searching for New Physics Inside Jets with the Herwig 7 Generalised Parton Shower / Kim, Taehee (Seoul Natl. U. (main)) ; Lee, Joon-Bin (Seoul Natl. U. (main)) ; Masouminia, M.R. (Durham U. (main)) ; Seymour, Michael H. (Manchester U. ; CERN) ; Yang, Un-ki (Seoul Natl. U. (main))
This study investigates parton shower evolution incorporating both Standard Model (SM) and beyond-the-Standard-Model (BSM) radiation, focusing on the phenomenology of a massive $Z'$ boson. [...]
CERN-TH-2026-074 ; MCnet-26-05 ; IPPP-26-15 ; arXiv:2604.00617. - 27.
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2026-04-03
05:00
A Pati-Salam realization of the Nelson-Barr mechanism / Murgui, Clara (CERN)
We present a UV completion of the Standard Model in which quarks and leptons are unified under color SU(4). [...]
CERN-TH-2026-033 ; arXiv:2604.00166. - 15.
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2026-04-02
04:25
First-principle evaluation of inclusive hadronic $τ$ decays in QCD+QED / Di Carlo, Matteo (CERN) ; Bacchio, Simone (Cyprus Inst.) ; Bäske, Erik (Humboldt U., Berlin (main)) ; De Santis, Alessandro (Helmholtz Inst., Mainz ; Darmstadt, GSI) ; Evangelista, Antonio (Cyprus U.) ; Frezzotti, Roberto (INFN, Rome2 ; Rome U., Tor Vergata) ; Gagliardi, Giuseppe (INFN, Rome3) ; Holan, Lukas (Humboldt U., Berlin (main)) ; Lubicz, Vittorio (INFN, Rome3 ; Rome III U.) ; Maio, Lorenzo (INFN, Rome2 ; U. Rome 2, Tor Vergata (main)) et al.
We present a strategy to extend lattice calculations of inclusive hadronic $τ$ decays from isosymmetric QCD to QCD+QED. The inclusive decay rate can be related to suitable Euclidean correlation functions, allowing for a first-principles evaluation of electromagnetic and isospin-breaking effects. [...]
arXiv:2603.29016; CERN-TH-2026-067.- 2026-03-30 - 10 p. - Published in : PoS: LATTICE2025 (2025) , pp. 249 Fulltext: PDF;
In : 42th International Symposium on Lattice Field Theory (Lattice 2025), Mumbai, India, 2 - 8 Nov 2025, pp.

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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. [...]
arXiv:2603.29024 ; MIT-CTP/6015 ; CERN-TH-2026-078. - 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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2026-03-27
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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