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2025-12-17
04:44
The heavy quark-antiquark asymmetry in the variable flavor number scheme / Behring, A. (Garching, Max Planck Inst.) ; Blümlein, J. (DESY ; Dortmund U.) ; De Freitas, A. (Linz U., RISC) ; von Manteuffel, A. (Regensburg U.) ; Schneider, C. (Linz U., RISC) ; Schönwald, K. (CERN)
The twist-2 heavy-quark and antiquark distributions, as defined in the variable flavor number scheme, turn out to be different due to QCD corrections from three-loop onward. [...]
DESY 25-185 ; CERN-TH-2025-259 ; MPP-2025-227 ; RISC Report series 25-10 ; arXiv:2512.13508. - 17.
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2025-12-16
04:05
Constraints on light QCD and CP-violating axions from the death line of rotation-powered pulsars / Witte, Samuel J. (U. Oxford (main) ; DESY ; U. Hamburg (main)) ; Caputo, Andrea (CERN ; U. Rome La Sapienza (main) ; Weizmann Inst.) ; Stelzl, Stefan (Ecole Polytechnique, Lausanne ; Barcelona, IFAE) ; Chernoglazov, Alexander (Princeton, Inst. Advanced Study) ; Philippov, Alexander A. (Maryland U.) ; Rajendran, Surjeet (Johns Hopkins U.)
For axions that couple to nucleons, the presence of dense nuclear matter can displace the axion from its vacuum minimum, sourcing large field gradients around neutron stars (and, more generally, compact objects). [...]
DESY-25-111 ; CERN-TH-2025-251 ; arXiv:2512.11023. - 60.
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2025-12-13
04:34
Hiding a Light Vector Boson from Terrestrial Experiments: A Chargephobic Dark Photon / Esseili, Haidar (Oregon U.) ; Kribs, Graham D. (Oregon U. ; CERN)
We calculate the terrestrial, astrophysical and cosmological constraints on a light vector boson that couples to an arbitrary combination of the electromagnetic and $B-L$ currents of the Standard Model. [...]
CERN-TH-2025-242 ; arXiv:2512.10916. - 54.
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2025-12-13
04:12
Conformal collider bootstrap in ${\mathcal N}=4$ SYM / Dempsey, Ross (MIT) ; Karlsson, Robin (Oxford U., Inst. Math.) ; Pufu, Silviu S. (Princeton U. (main)) ; Zahraee, Zahra (Perimeter Inst. Theor. Phys.) ; Zhiboedov, Alexander (CERN)
We use a combination of perturbation theory, holography, supersymmetric localization, integrability, and numerical conformal bootstrap methods to constrain the energy-energy correlator in $\text{SU}(N_c)$${\mathcal N}=4$ SYM at finite coupling. [...]
CERN-TH-2025-212 ; MIT-CTP/5979 ; PUPT-2659 ; arXiv:2512.10796. - 97.
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2025-12-13
04:04
Nonlocal form factor of chromomagnetic penguin in $B\to K\ell^+\ell^-$ from QCD light-cone sum rules / Hurth, T. (U. Mainz, PRISMA) ; Khodjamirian, A. (Siegen U.) ; Mahmoudi, F. (IP2I, Lyon ; CERN ; IUF, Paris) ; Mishra, D. (IP2I, Lyon) ; Monceaux, Y. (IP2I, Lyon) ; Neshatpour, S. (IP2I, Lyon)
The branching fraction of the $B \to K\ell^+\ell^-$ decay has been measured recently by the LHC experiments, showing a deviation from theory predictions based on the Standard Model (SM). [...]
CERN-TH-2025-253 ; MITP-25-076 ; SI-HEP-2025-28 ; P3H-25-109 ; arXiv:2512.10868. - 36.
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2025-12-12
04:01
Neutrinos, B-L Symmetry and the Dark Dimension / Montero, Miguel (Madrid, IFT) ; Vafa, Cumrun (Harvard U., Phys. Dept.) ; Valenzuela, Irene (Madrid, IFT ; CERN)
We consider realizations of a gauged B-L symmetry in the context of the Dark Dimension scenario, where the SM lives on a codimension one brane in 5d spacetime. [...]
IFT-25-158 ; CERN-TH-2025-255 ; arXiv:2512.09052. - 16.
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2025-12-11
04:48
Two-loop renormalization of general bosonic effective field theories / Guedes, Guilherme (CERN) ; Roosmale Nepveu, Jasper (Taiwan, Natl. Taiwan U. ; Unlisted, TW)
The renormalization of higher-dimensional operators in quantum field theory is essential for phenomenological analyses in particle physics, and plays a significant role in the study of critical phenomena. [...]
CERN-TH-2025-250 ; arXiv:2512.08827. - 24.
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2025-12-06
04:21
Dynamical Love Numbers for Black Holes and Beyond from Shell Effective Field Theory / Kosmopoulos, Dimitrios (CERN) ; Perrone, Davide (U. Geneva (main)) ; Solon, Mikhail (UCLA)
We construct a novel effective field theory for a compact body coupled to gravity, whose key feature is that the dynamics of gravitational perturbations is explicitly determined by known solutions in black hole perturbation theory in four dimensions. [...]
arXiv:2512.04002 ; CERN-TH-2025-247. - 5.
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2025-12-06
04:20
Powerful Yukawas / Cohen, Timothy (CERN ; Ecole Polytechnique, Lausanne ; Oregon U.) ; McCullough, Matthew (CERN) ; Weiner, Neal (CERN ; New York U. (main))
We introduce a class of models where the masses of the light Standard Model fermions are due to an Effective Field Theory operator that appears beyond dimension-4 in the power counting expansion, resulting in a `Powerful Yukawa'. [...]
CERN-TH-2025-227 ; arXiv:2512.04270. - 12.
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2025-12-06
04:20
How large can lepton mixing be? / de Blas, J. (Granada U.) ; Giuliano, C. (Granada U.) ; Guedes, G. (DESY ; CERN) ; López, R. Sánchez (Granada U.) ; Santiago, J. (Granada U.)
We show that, contrary to common expectations, the observed charged leptons can have a substantial mixing with new heavier fermions, at the level of 20$\%$ [...]
CERN-TH-2025-248 ; arXiv:2512.04148. - 38.
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