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2025-11-21
04:10
The quark jet function for $k_T$-like variables in NNLO QCD / Buonocore, Luca (CERN) ; Grazzini, Massimiliano (Zurich U.) ; Guadagni, Flavio (Zurich U.) ; Haag, Jürg (U. Bern, AEC) ; Rottoli, Luca (Milan Bicocca U. ; INFN, Milan Bicocca)
The precise description of jet processes requires observables capable of efficiently capturing the dynamics of the energy flow in hadronic final states. We consider a class of tranverse-momentum like resolution variables that smoothly describe the $n+1$ to $n$ jet transition in multi-jet processes. [...]
arXiv:2508.19226; ZU-TH 54/25; CERN-TH-2025-167.- 2025-11-12 - 20 p. - Published in : Eur. Phys. J. C 85 (2025) 1290 Fulltext: document - PDF; 2508.19226 - PDF;

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2025-07-24
04:52
Gravitational Wave Scattering on Magnetic Fields / Domcke, Valerie (CERN) ; Garcia-Cely, Camilo (Valencia U., IFIC) ; Lee, Sung Mook (CERN)
The conversion of gravitational to electromagnetic waves in the presence of background magnetic fields is known as the inverse Gertsenshtein effect, analogous to the Primakoff effect for axions. Rephrasing this conversion as a classical electrodynamics problem in the far-field regime of a magnetized region, we derive the angular distribution of the intensity and polarization of the emitted electromagnetic waves. [...]
arXiv:2507.16609; CERN-TH-2025-142.- 2025 - 47 p. - Published in : JCAP 2511 (2025) 016 Fulltext: 2507.16609 - PDF; document - PDF;

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2025-07-24
04:36
(Quadratically) Refined Discrete Anomaly Cancellation / Dierigl, Markus (CERN) ; Tartaglia, Michelangelo (CSIC, Madrid)
In this work we study the cancellation of non-perturbative anomalies of gravitational theories with gauge group $\mathbb{Z}_k$ in six dimensions. These subtle anomalies require a classification of deformation classes of manifolds with discrete gauge bundles known as bordism groups. [...]
arXiv:2504.02934; CERN-TH-2025-068; IFT-25-35.- 2025-08-19 - 44 p. - Published in : JHEP 2508 (2025) 145 Fulltext: 2504.02934 - PDF; document - PDF;

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2025-07-22
04:19
CP violation in $K\toμ^+μ^-$ with and without time dependence through a tagged analysis / D'Ambrosio, Giancarlo (INFN, Naples) ; Dery, Avital (CERN) ; Grossman, Yuval (Cornell U., LEPP) ; Kitahara, Teppei (Chiba U. ; KMI, Nagoya ; Nagoya U.) ; Marchevski, Radoslav (EPFL, Lausanne, LPPC) ; Martínez Santos, Diego (U. A Coruna) ; Schacht, Stefan (Durham U., IPPP)
We point out that using current knowledge of ${\cal B}(K^0_L\toμ^+μ^-)$ and $ {\cal B}(K^0_L\to γγ)$, one can extract short-distance information from the combined measurement of the time-integrated CP asymmetry, $A_{\rm CP}(K^0\toμ^+μ^-)$, and of ${\cal B}(K^0_S\toμ^+μ^-)$. We discuss the interplay between this set of observables, and demonstrate that determining ${\rm sign}[A_{\rm CP}(K^0\toμ^+μ^-)]$ would eliminate the discrete ambiguity in the Standard Model prediction for ${\cal B}(K^0_L\toμ^+μ^-)$. [...]
arXiv:2507.13445; CERN-TH-2025-047; CHIBA-EP-272; IPPP/25/46.- 2025-09-24 - 26 p. - Published in : JHEP 2509 (2025) 190 Fulltext: 2507.13445 - PDF; document - PDF;

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2025-07-17
04:10
Towards NNLO QCD predictions for off-shell top-quark pair production and decays / Buonocore, Luca (CERN) ; Grazzini, Massimiliano (Zurich U.) ; Kallweit, Stefan (Zurich U.) ; Lindert, Jonas M. (Sussex U.) ; Savoini, Chiara (Munich, Tech. U.)
We consider QCD radiative corrections to $W^+W^-b {\bar b}$ production with leptonic decays and massive bottom quarks at the LHC. We perform an exact next-to-leading order (NLO) calculation within the $q_T$-subtraction formalism and validate it against an independent computation in the dipole subtraction scheme. [...]
arXiv:2507.11410; ZU-TH-47/25; TUM-HEP-1565/25; CERN-TH-2025-130.- 2025 - 85 p. - Published in : JHEP 2510 (2025) 195 Fulltext: 2507.11410 - PDF; document - PDF;

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2025-07-09
08:26
Superadditivity at Large Charge / Cohen, Timothy (CERN ; EPFL, Lausanne, LPTP ; Oregon U.) ; Fadakar, Ipak (EPFL, Lausanne, LPTP ; Pisa, Scuola Normale Superiore) ; Gomes, Andrew (EPFL, Lausanne, LPTP) ; Monin, Alexander (South Carolina U.) ; Rattazzi, Riccardo (EPFL, Lausanne, LPTP)
The weak gravity conjecture has been invoked to conjecture that the dimensions of charged operators in a CFT should obey a superadditivity relation (sometimes referred to as convexity). In this paper, we study superadditivity of the operator spectrum in theories expanded about the semi-classical saddle point that dominates correlators of large charge operators. [...]
arXiv:2503.16603; CERN-TH-2025-036.- 2025 - 27 p. - Published in : JHEP 2507 (2025) 113 Fulltext: 2503.16603 - PDF; document - PDF;

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2025-07-09
07:48
Challenging $\bar{B}_{(s)}\to D_{(s)}^{(*)}$ Form Factors with the Heavy Quark Expansion / Bordone, Marzia (Siegen U. ; CERN ; Zurich U.) ; Gubernari, Nico (Cambridge U., DAMTP) ; Jung, Martin (Turin U. ; INFN, Turin) ; van Dyk, Danny (Durham U., IPPP)
Recent publications by three lattice QCD collaborations have provided an unprecedented wealth of theoretical predictions for the $\bar{B}_q \to D_q^{(*)}$ form factors, for spectator flavours $q=u/d$ and $q=s$. We analyse these predictions within the framework of the heavy-quark expansion (HQE) to order $α_s$, $1/m_b$, and $1/m_c^2$. [...]
arXiv:2507.03569; CERN-TH-2025-092; EOS-2025-03; IPPP/25/25; P3H-25-032; SI-HEP-2025-10; ZU-TH 35/25.- 2025 - 34 p. - Published in : JHEP 2511 (2025) 051 Fulltext: 2507.03569 - PDF; document - PDF;

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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.) ; Höllwieser, Roman (Wuppertal U.) ; Knechtli, Francesco (Wuppertal U.) ; Korzec, Tomasz (Wuppertal U.) ; Finkenrath, Jacob (CERN) ; Peardon, Michael (Trinity Coll., Dublin)
We investigate the mixing between flavor-singlet light meson and charmonium operators in the S-wave channels, i.e. pseudo-scalar and vector channel, at two different pion masses. [...]
arXiv:2506.22132; WUB/25-04; CERN-TH-2025-114.- 2025-10-01 - 14 p. - Published in : Phys. Rev. D 112 (2025) 074502 Fulltext: 2506.22132 - PDF; document - PDF;

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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. In these models, all CP violation arises from a single spontaneous symmetry-breaking scale, linking the origin of quark and lepton CP phases. [...]
arXiv:2506.18963; CALT-TH/2025-020; CERN-TH-2025-118.- 2025 - 39 p. - Published in : JHEP 2509 (2025) 113 Fulltext: 2506.18963 - PDF; document - PDF;

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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. These corrections both stabilise the perturbative behaviour in $m_{j_1j_2}$ and lead to a significantly improved description of data from a recent ATLAS measurement..
arXiv:2506.17438; CERN-TH-2025-120; DESY-25-109; IPPP/25/35.- 2025 - 24 p. - Published in : JHEP 2510 (2025) 196 Fulltext: 2506.17438 - PDF; document - PDF;

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