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2025-05-13
04:08
pNGB Higgs Naturalness at a Tipping Point / McCullough, Matthew (CERN) ; Menkara, Adriana (DESY) ; Salvioni, Ennio (Sussex U.)
In scenarios where the Higgs is viewed as a pseudo Nambu-Goldstone boson (pNGB) the question of naturalness finds itself, from a phenomenological perspective, at a tipping point between direct searches and precision. [...]
CERN-TH-2025-067 ; DESY-25-052 ; arXiv:2505.06052. - 21.
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2025-05-07
04:03
The Simplest Dark Matter Model at the Edge of Perturbativity / Escudero, Miguel ; Hambye, Thomas
Increasingly sensitive direct detection dark matter experiments are testing important regions of parameter space for WIMP dark matter and pushing many models to the multi-TeV regime. [...]
CERN-TH-2025-087 ; ULB-TH/25-04 ; arXiv:2505.02408. - 5.
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2025-05-06
04:31
Gravitational Wave Memory of Primordial Black Hole Mergers / Gasparotto, Silvia (Barcelona, IFAE) ; Franciolini, Gabriele (CERN) ; Domcke, Valerie (CERN)
The gravitational wave signal of binary compact objects has two main contributions at frequencies below the characteristic merger frequency: the gravitational wave signal associated with the early inspiral stage of the binary and the non-linear gravitational wave memory. [...]
CERN-TH-2025-051 ; arXiv:2505.01356. - 17.
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2025-05-02
04:23
A Universal Equilibration Condition for Heavy Quarks / Rajagopal, Krishna (MIT) ; Scheihing-Hitschfeld, Bruno (Santa Barbara, KITP) ; Wiedemann, Urs Achim (CERN)
Kinetic equilibration at late times is physically required for heavy particles in a finite temperature medium. [...]
CERN-TH-2025-088 ; MIT-CTP/5858 ; arXiv:2504.21139. - 6.
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2025-04-30
05:07
Starlight from JWST: Implications for star formation and dark matter models / Ellis, John ; Fairbairn, Malcolm ; Urrutia, Juan ; Vaskonen, Ville
We confront the star formation rate in different dark matter (DM) models with UV luminosity data from JWST up to $z\simeq25$ and legacy data from HST. [...]
KCL-PH-TH/2025-12 ; CERN-TH-2025-085 ; AION-REPORT/2025-03 ; arXiv:2504.20043. - 15.
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2025-04-29
05:22
Renormalizing Two-Fermion Operators in the SMEFT via Supergeometry / Assi, Benoît (Fermilab ; Cincinnati U.) ; Helset, Andreas (CERN) ; Pagès, Julie (UC, San Diego) ; Shen, Chia-Hsien (Taiwan, Natl. Taiwan U. ; NCTS, Taipei)
We extend the geometric framework of field-space covariance for loop computations, thereby unifying the treatment of scalars, fermions, and gauge bosons in effective field theories. [...]
CERN-TH-2025-084 ; FERMILAB-PUB-25-0280-V ; arXiv:2504.18537. - 34.
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2025-04-25
04:05
Long distance contributions to neutral $D$-meson mixing from lattice QCD / Di Carlo, Matteo (CERN) ; Erben, Felix (CERN) ; Hansen, Maxwell T. (Edinburgh U.)
The study of neutral $D$-meson mixing provides a unique probe of long-distance effects in the charm sector, where Standard Model contributions are dominated by nonperturbative effects. [...]
CERN-TH-2025-075 ; arXiv:2504.16189. - 45.
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2025-04-19
04:02
Natural complex plane for kaon CKM data: framework, status and future / Dery, Avital (CERN)
Kaon physics can be used to independently determine three out of the four parameters of the CKM matrix, without any B physics input. [...]
CERN-TH-2025-077 ; arXiv:2504.12386. -
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2025-04-19
04:01
Probing CP-Violating Neutral Triple Gauge Couplings at Electron-Positron 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.)
We study the forms of CP-violating (CPV) neutral triple gauge couplings (nTGCs) that can be realized via dimension-8 operators in the Standard Model Effective Field Theory (SMEFT). [...]
KCL-PH-TH/2025-01 ; CERN-TH-2025-002 ; arXiv:2504.13135. - 19 p, 19.
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2025-04-19
04:01
Geometry of soft scalars at one loop / Cohen, Timothy (CERN ; EPFL, Lausanne, LPTP ; Oregon U.) ; Fadakar, Ipak (EPFL, Lausanne, LPTP ; Pisa, Scuola Normale Superiore) ; Helset, Andreas (CERN) ; Nardi, Filippo (EPFL, Lausanne, LPTP)
We extend the soft theorems for scattering amplitudes of scalar effective field theories to one-loop order. [...]
CERN-TH-2025-081 ; arXiv:2504.12371. - 28.
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