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2025-08-21
06:09
Data-driven analyses and model-independent fits for present $b\to s \ell \ell$ results / Hurth, T. (U. Mainz, PRISMA) ; Mahmoudi, F. (IP2I, Lyon ; CERN ; IUF, Paris) ; Monceaux, Y. (IP2I, Lyon) ; Neshatpour, S. (IP2I, Lyon)
We present a critical assessment of the present $B$ anomalies in the exclusive $b \to s \ell\ell$ mode based on the QCD factorisation approach (QCDf). [...]
CERN-TH-2025-164 ; MITP/25-055 ; arXiv:2508.09986. - 29.
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2025-08-21
06:01
Deformations of Starobinsky Inflation in No-Scale SU(5) and SO(10) GUTs / Ellis, John (King's Coll. London ; CERN) ; Garcia, Marcos A.G. (Mexico U.) ; Nagata, Natsumi (Tokyo U.) ; Nanopoulos, Dimitri V. (CERN ; Unlisted, GR ; TAMU, College Station) ; Olive, Keith A. (Minnesota U., Theor. Phys. Inst.)
The original Starobinsky $R + R^2$ model of inflation is consistent with Planck and other measurements of the CMB, but recent results from the ACT and SPT Collaborations hint that the tilt of scalar perturbations may be in tension with the prediction of the Starobinsky model. [...]
FTPI-MINN-25/07 ; UMN-TH-4501/25 ; KCL-PH-TH/2025-36 ; CERN-TH-2025-160 ; arXiv:2508.13279. - 36.
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2025-08-19
04:27
The DNA of nuclear models: How AI predicts nuclear masses / Richardson, Kate A. ; Trifinopoulos, Sokratis ; Williams, Mike
Obtaining high-precision predictions of nuclear masses, or equivalently nuclear binding energies, $E_b$, remains an important goal in nuclear-physics research. [...]
CERN-TH-2025-153 ; arXiv:2508.08370. - 19.
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2025-08-15
04:58
Bubble Trouble: a Review on Electroweak Baryogenesis / van de Vis, Jorinde (CERN) ; de Vries, Jordy (Amsterdam U. ; Nikhef, Amsterdam) ; Postma, Marieke (Nikhef, Amsterdam ; Nijmegen U., IMAPP)
The origin of the universal asymmetry between matter and antimatter remains a mystery. [...]
CERN-TH-2025-161 ; Nikhef 2025-012 ; arXiv:2508.09989. - 123.
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2025-08-14
05:01
Precision calculation of $N_{\text{eff}}$ with Neutrino Direct Simulation Monte Carlo / Ihnatenko, Oleksii (Taras Shevchenko U.) ; Ovchynnikov, Maksym (CERN)
Neutrino Direct Simulation Monte Carlo approach ($ν$DSMC) is a method of solving the neutrino Boltzmann equation in the Early Universe, proposed to study the evolution of neutrinos under various cosmological setups. [...]
CERN-TH-2025-158 ; arXiv:2508.08379. - 13.
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2025-08-14
04:59
A Compact Story of Positivity in de Sitter / Chakraborty, Priyesh (Harvard U.) ; Cohen, Timothy (CERN ; Ecole Polytechnique, Lausanne ; Oregon U.) ; Green, Daniel (UC, San Diego) ; Huang, Yiwen (UC, San Diego)
Recent developments have yielded significant progress towards systematically understanding loop corrections to de Sitter (dS) correlators. [...]
CERN-TH-2025-154 ; arXiv:2508.08359. - 51.
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2025-08-12
07:41
Cancellation of one-loop correction to soft tensor power spectrum / Ema, Yohei (CERN) ; Hong, Muzi (Tokyo U. ; Tokyo U., IPMU ; Tokyo U., RESCEU) ; Jinno, Ryusuke (Kobe U.) ; Mukaida, Kyohei (KEK, Tsukuba ; Sokendai, Tsukuba)
We demonstrate that there are no scale-invariant one-loop corrections to the superhorizon tensor perturbations from small-scale (potentially enhanced) scalar perturbations, irrespective of the details of inflationary background time evolution. [...]
CERN-TH-2025-117 ; RESCEU-14/25 ; IPMU25-0030 ; KOBE-COSMO-25-13 ; KEK-TH-2731 ; arXiv:2506.15780. - 13.
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2025-08-09
04:16
Effective Field Theory Constraints on Primordial Black Holes from the High-Redshift Lyman-$α$ Forest / Ivanov, Mikhail M. (MIT) ; Trifinopoulos, Sokratis (MIT ; CERN ; Zurich U.)
We present updated constraints on the abundance of primordial black holes (PBHs) dark matter from the high-redshift Lyman-$α$ forest data from MIKE/HIRES experiments. [...]
MIT-CTP/5895 ; CERN-TH-2025-155 ; arXiv:2508.04767. - 4.
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2025-08-08
04:42
Flavour Physics Beyond the Standard Model / Altmannshofer, Wolfgang (UC, Santa Cruz, Inst. Part. Phys.) ; Stangl, Peter (CERN)
Flavour physics plays a central role in the search for physics beyond the Standard Model, posing fundamental questions whose answers may point to new physics scales far above the electroweak scale. [...]
CERN-TH-2025-156 ; arXiv:2508.03950. - 33.
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2025-08-06
04:42
Lattice Calculation of Short-Range Contributions to Neutrinoless Double-Beta Decay $π^-\toπ^+ ee$ at Physical Pion Mass / Boyle, Peter (Brookhaven ; Edinburgh U.) ; Erben, Felix (CERN) ; Feng, Xu (Peking U. ; CICQM, Beijing ; Peking U., CHEP ; Southampton U.) ; Flynn, Jonathan M. (Southampton U.) ; Garron, Nicolas (Liverpool U. ; Liverpool U., Dept. Math. ; RIKEN BNL) ; Izubuchi, Taku (Brookhaven ; Edinburgh U.) ; Jin, Luchang (Connecticut U.) ; Mukherjee, Rajnandini (Edinburgh U. ; Southampton U.) ; Tsang, J. Tobias (CERN ; Liverpool U., Dept. Math. ; RIKEN BNL) ; Tuo, Xin-Yu (Brookhaven ; Edinburgh U.)
Neutrinoless double-beta ($0νββ$) decays provide an excellent probe for determining whether neutrinos are Dirac or Majorana fermions. [...]
arXiv:2508.01900 ; CERN-TH-2025-132. - 26.
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