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TH Preprints

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2025-07-04
04:00
Transmutation of $^{16}$O and $^{20}$Ne at the Large Hadron Collider / Nijs, Govert (CERN) ; van der Schee, Wilke (CERN ; Utrecht U. (main) ; Nikhef, Amsterdam ; Tech. U., Dortmund (main))
In July 2025 the Large Hadron Collider (LHC) will collide $^{16}$O$^{16}$O and $^{20}$Ne$^{20}$Ne isotopes in a quest to understand the physics of ultrarelativistic light ion collisions. [...]
CERN-TH-2025-127 ; arXiv:2507.01659. - 3.
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2025-07-01
04:40
S-wave flavor-singlet meson mixing in QCD with light and charm quarks / Urrea-Niño, Juan Andrés (Trinity Coll., Dublin ; Wuppertal U.) ; Finkenrath, Jacob (CERN) ; Höllwieser, Roman (Wuppertal U.) ; Knechtli, Francesco (Wuppertal U.) ; Korzec, Tomasz (Wuppertal U.) ; Peardon, Michael (Trinity Coll., Dublin)
We investigate the mixing between flavor-singlet light meson and charmonium operators in the S-wave channels, i.e. [...]
WUB/25-04 ; CERN-TH-2025-114 ; arXiv:2506.22132. - 14.
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2025-06-28
05:01
Probing Neutral Triple Gauge Couplings via $ZZ$ Production at $e^+e^-$ Colliders / Ellis, John (Shanghai Jiao Tong U. ; King's Coll. London ; CERN) ; He, Hong-Jian (Tsung-Dao Lee Inst., Shanghai ; Shanghai Jiao Tong U. ; Tsinghua U., Beijing ; Peking U., CHEP) ; Xiao, Rui-Qing (Peking U.) ; Zeng, Shi-Ping (Tsung-Dao Lee Inst., Shanghai ; Shanghai Jiao Tong U.)
Neutral triple gauge couplings (nTGCs) first arise from the dimension-8 operators of the Standard Model Effective Field Theory (SMEFT), rather than the dimension-4 SM Lagrangian and dimension-6 SMEFT operators, opening up a unique window for probing new physics at the dimension-8 level. [...]
KCL-PH-TH/2025-28 ; CERN-TH-2025-122 ; arXiv:2506.21433. - 2024-11-07 - 32.
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2025-06-26
04:26
Leptogenesis in automatic Nelson-Barr models / Murgui, Clara (CERN) ; Patrone, Samuel (Caltech)
In this study, we numerically show that automatic Nelson-Barr models with new chiral fermions can simultaneously solve the strong CP problem and generate the observed baryon asymmetry via high-scale leptogenesis. [...]
CALT-TH/2025-020 ; CERN-TH-2025-118 ; arXiv:2506.18963. - 40.
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2025-06-25
04:24
Stable perturbative predictions for isolated photon production with a jet pair at large $m_{j_1 j_2}$ / Andersen, Jeppe R. (Durham U., IPPP ; CERN) ; Maier, Andreas (Barcelona, IFAE ; Barcelona, Autonoma U.) ; Rosca, Malina (Durham U., IPPP) ; Ruisi, Giacomo (DESY, Zeuthen)
We present the first calculation of the high-energy corrections to the process of isolated photon production in association with two jets. [...]
CERN-TH-2025-120 ; IPPP/25/35 ; arXiv:2506.17438. - 24.
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2025-06-19
04:04
A Determination of $α_s(m_Z)$ at aN$^3$LO$_{\bf QCD}\otimes {\bf NLO}_{\bf QED}$ Accuracy from a Global PDF Analysis / Ball, Richard D. (U. Edinburgh, Higgs Ctr. Theor. Phys.) ; Barontini, Andrea (INFN, Milan ; Milan U.) ; Cruz-Martinez, Juan (CERN) ; Forte, Stefano (INFN, Milan ; Milan U.) ; Hekhorn, Felix (Jyvaskyla U. ; Helsinki U.) ; Nocera, Emanuele R. (Turin U. ; INFN, Turin) ; Rojo, Juan (Vrije U., Amsterdam ; NIKHEF, Amsterdam) ; Stegeman, Roy (Heriot-Watt U. (main))
We present a determination of the strong coupling $α_s(m_Z)$ from a global dataset including both fixed-target and collider data from deep-inelastic scattering and a variety of hadronic processes, with a simultaneous determination of parton distribution functions (PDFs) based on the NNPDF4.0 methodology. [...]
arXiv:2506.13871 ; TIF-UNIMI-2025-10 ; Edinburgh 2024/12 ; CERN-TH-2025-106. - 21.
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2025-06-18
04:50
Flavoured jet algorithms: a comparative study / Behring, Arnd (Garching, Max Planck Inst.) ; Caletti, Simone (Zurich, ETH) ; Giuli, Francesco (Rome U., Tor Vergata ; INFN, Rome) ; Grabarczyk, Radoslaw (Oxford U. ; Oxford U., Theor. Phys.) ; Hinzmann, Andreas (DESY) ; Huss, Alexander (CERN) ; Huston, Joey (Michigan State U.) ; Lesser, Ezra D. (CERN) ; Marzani, Simone (Genoa U. ; INFN, Genoa) ; Napoletano, Davide (Milan Bicocca U. ; INFN, Milan Bicocca) et al.
The accurate identification of heavy-flavour jets, those which originate from bottom or charm quarks, is crucial for precision studies of the Standard Model and searches for new physics. [...]
arXiv:2506.13449 ; CERN-TH-2025-113 ; IFJPAN-IV-2025-13 ; MCNET-25-14 ; MPP-2025-118 ; PUBDB-2025-01862. - 2025-06-16 - 81.
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2025-06-14
04:36
Personal Memories of 50 Years of Quarkonia / Ellis, John (King's Coll. London ; CERN)
The world of particle physics was revolutionised in November 1974 by the discovery of the J/psi particle, the first particle to be identified as a quarkonium state composed of charm quarks and antiquarks. [...]
KCL-PH-TH/2025-22 ; CERN-TH-2025-115 ; arXiv:2506.10643. - 10.
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2025-06-12
05:50
Time-Dependent Precision Measurement of $B_s^0\rightarrow \phi \mu^+\mu^-$ Decay at FCC-$ee$ / Kwok, Tsz Hong (Zurich U.) ; Polonsky, Zachary (Zurich U.) ; Lukashenko, Valeriia (Zurich U.) ; Aebischer, Jason (CERN) ; Kilminster, Ben (Zurich U.)
We study the feasibility of measuring time-dependent $C\!P$ violation in the rare flavor-changing neutral current (FCNC) decay $B_s^0 \rightarrow \phi(\rightarrow K^+K^-) \mu^+ \mu^-$ at the FCC-$ee$. [...]
arXiv:2506.08089 ; CERN-EP-DRAFT-MISC-2025-007 ; CERN-TH-2025-095. - 38.
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2025-06-12
05:47
Numerical stability of force-gradient integrators and their Hessian-free variants in lattice QCD simulations / Schäfers, Kevin (Wuppertal U.) ; Finkenrath, Jacob (CERN) ; Günther, Michael (Wuppertal U.) ; Knechtli, Francesco (Wuppertal U.)
We investigate the numerical stability of force-gradient integrators and their Hessian-free variants within the molecular dynamics step of the Hamiltonian Monte Carlo algorithm in lattice QCD simulations. [...]
CERN-TH-2025-093 ; arXiv:2506.08813. - 18.
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