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TH Preprints

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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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2025-06-12
05:37
Event generation at MEPS@NLO accuracy in neutral and charged current DIS at the EIC / Meinzinger, Peter (Zurich U.) ; Reichelt, Daniel (CERN) ; Silvetti, Federico (Durham U., IPPP)
We present the first hadron-level predictions at MEPS@NLO precision for both neutral and charged current DIS at the EIC and the first application of the MEPS@NLO technique to charged current DIS in general. [...]
ZU-TH 43/25 ; CERN-TH-2025-110 ; IPPP/25/31 ; MCNET-25-13 ; arXiv:2506.08994. - 30.
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2025-06-06
06:38
Backtracking AdS flux vacua / Apers, Fien (Oxford U., Theor. Phys.) ; Montero, Miguel (Madrid, IFT) ; Valenzuela, Irene (Madrid, IFT ; CERN)
We introduce an algorithm (dubbed "flux backtracking") to reverse-engineer the brane picture from an AdS flux vacuum. [...]
CERN-TH-2025-109 ; IFT-25-062 ; arXiv:2506.03314. - 24.
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2025-06-05
06:47
On-shell recursion relations for higher-spin Compton amplitudes / Ema, Yohei (CERN) ; Gao, Ting (Minnesota U.) ; Ke, Wenqi (Minnesota U. ; Minnesota U., Theor. Phys. Inst.) ; Liu, Zhen (Minnesota U.) ; Mahbub, Ishmam (Minnesota U.)
We recursively construct tree-level electromagnetic and gravitational Compton amplitudes of higher-spin massive particles by the all-line transverse momentum shift. [...]
CERN-TH-2025-090 ; UMN-TH-4423/25 ; FTPI-MINN-25-05 ; arXiv:2506.02106. - 32.
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2025-06-04
05:30
1-loop renormalisability of integrable sigma-models from 4d Chern-Simons theory / Lacroix, Sylvain (Paris, LPTHE) ; Levine, Nat (Amsterdam U.) ; Wallberg, Anders (CERN ; Ecole Polytechnique, Lausanne)
Large families of integrable 2d sigma-models have been constructed at the classical level, partly motivated by the utility of integrability on the string worldsheet. [...]
CERN-TH-2025-107 ; arXiv:2505.23890. - 75.
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2025-06-03
06:03
Likelihoods for Stochastic Gravitational Wave Background Data Analysis / Franciolini, Gabriele (CERN) ; Pieroni, Mauro (CERN ; Madrid, Inst. Estructura Materia) ; Ricciardone, Angelo (Pisa U. ; INFN, Pisa) ; Romano, Joseph D. (CUNY, Graduate School - U. Ctr. ; Texas U., Brownsville, CGWA)
We present a systematic study of likelihood functions used for Stochastic Gravitational Wave Background (SGWB) searches. [...]
CERN-TH-2025-094 ; arXiv:2505.24695. - 25.
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