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CERN Theory

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2023-03-20
04:21
Ultraviolet Sensitivity in Higgs-Starobinsky Inflation / Lee, Sung Mook (IPAP, Seoul ; Yonsei U. ; CERN) ; Modak, Tanmoy (Taiwan, Natl. Taiwan U. ; Tokyo Woman's Christian U.) ; Oda, Kin-ya ; Takahashi, Tomo (Saga U., Japan)
The general scalar-tensor theory that includes all the dimension-four terms has parameter regions that can produce successful inflation consistent with cosmological observations. [...]
CERN-TH-2023-040 ; arXiv:2303.09866. - 23 p.
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2023-03-18
04:16
Collider constraints on electroweakinos in the presence of a light gravitino / GAMBIT Collaboration
Using the GAMBIT global fitting framework, we constrain the MSSM with an eV-scale gravitino as the lightest supersymmetric particle, and the six electroweakinos (neutralinos and charginos) as the only other light new states. [...]
arXiv:2303.09082 ; TTP23-009 ; KCL-PH-TH/2023-21 ; gambit-physics-23 ; MCnet-23-05, ADP-23-08/T1217 ; CERN-TH-2023-043. - 38 p.
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2023-03-18
04:16
Scattering amplitudes from dispersive iterations of unitarity / Tourkine, Piotr (Annecy, LAPP) ; Zhiboedov, Alexander (CERN)
We present and numerically implement a computational method to construct relativistic scattering amplitudes that obey analyticity, crossing, elastic and inelastic unitarity in three and four spacetime dimensions. [...]
arXiv:2303.08839 ; CERN-TH-2023-025. - 114 p.
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2023-03-17
04:33
On the Running of Gauge Couplings in String Theory / Abel, Steven (CERN) ; Dienes, Keith R. (Arizona U. ; Maryland U.) ; Nutricati, Luca A.
In this paper we conduct a general, model-independent analysis of the running of gauge couplings within closed string theories. [...]
arXiv:2303.08534 ; CERN-TH-2023-044 ; IPPP/23/16. - 37 p.
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2023-03-14
09:08
CDF II W-mass anomaly faces first-order electroweak phase transition / Addazi, Andrea (SCU, Chengdu ; Frascati) ; Marciano, Antonino (Frascati ; Fudan U.) ; Morais, António P. (Aveiro U.) ; Pasechnik, Roman (Lund U., Dept. Theor. Phys.) ; Yang, Hao (Fudan U.)
We suggest an appealing strategy to probe a large class of scenarios beyond the Standard Model simultaneously explaining the recent CDF II measurement of the $W$ boson mass and predicting first-order phase transitions (FOPT) testable in future gravitational-wave (GW) experiments. Our analysis deploys measurements from the GW channels and high energy particle colliders. [...]
arXiv:2204.10315; CERN-TH-2023-039.- 2023-03-10 - 6 p. - Published in : Eur. Phys. J. C Fulltext: document - PDF; 2204.10315 - PDF;

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2023-03-14
09:05
Towards Resolving the Gallium Anomaly / Brdar, Vedran (CERN) ; Gehrlein, Julia (CERN) ; Kopp, Joachim (CERN ; Mainz U., Inst. Phys. ; U. Mainz, PRISMA)
A series of experiments studying neutrinos from intense radioactive sources have reported a deficit in the measured event rate which, in combination, has reached a statistical significance of $\sim 5\sigma$. [...]
arXiv:2303.05528 ; CERN-TH-2023-036. - 19 p.
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2023-03-14
09:04
Full NLO QCD predictions for Higgs-pair production in the 2-Higgs-Doublet Model / Baglio, J. (CERN) ; Campanario, F. (Valencia U. ; Valencia U., IFIC) ; Glaus, S. (KIT, Karlsruhe, TP ; KIT, Karlsruhe, IKP) ; Mühlleitner, M. (KIT, Karlsruhe, TP) ; Ronca, J. (Rome III U. ; INFN, Rome3) ; Spira, M. (PSI, Villigen)
After the discovery of the Higgs boson in 2012 at the CERN Large Hadron Collider (LHC), the study of its properties still leaves room for an extended Higgs sector with more than one Higgs boson. [...]
arXiv:2303.05409 ; CERN-TH-2022-108 ; IFIC/23-08 ; KA-TP-02-2023 ; P3H-23-013 ; PSI-PR-23-6. - 13 p.
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2023-03-13
04:15
The inverse Mellin transform via analytic continuation / Behring, A. ; Blümlein, J. ; Schönwald, K.
We present a method to calculate the $x$--space expressions of massless or massive operator matrix elements in QCD and QED containing local composite operator insertions, depending on the discrete Mellin index $N$, directly, without computing the Mellin--space expressions in explicit form analytically. [...]
arXiv:2303.05943 ; DESY 20--053 ; DO-TH 23/01 ; CERN-TH-2023-020 ; ZU--TH 13/23 13/23. - 43 p.
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2023-03-04
04:23
Stellar limits on scalars from electron-nucleus bremsstrahlung / Bottaro, Salvatore (Tel Aviv U. ; Washington U., Seattle) ; Caputo, Andrea (CERN) ; Raffelt, Georg (Munich, Max Planck Inst.) ; Vitagliano, Edoardo (Hebrew U.)
We revisit stellar energy-loss bounds on the Yukawa couplings $g_{\rm B,L}$ of baryophilic and leptophilic scalars $\phi$. [...]
arXiv:2303.00778 ; CERN-TH-2023-035. - 37 p.
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2023-02-28
05:51
NNLO QCD predictions for Z-boson production in association with a charm jet within the LHCb fiducial region / Gauld, R. (Munich, Max Planck Inst.) ; Gehrmann-De Ridder, A. ; Glover, E.W.N. (Durham U., IPPP) ; Huss, A. (CERN) ; Garcia, A. Rodriguez ; Stagnitto, G.
We compute next-to-next-to-leading order (NNLO) QCD corrections to neutral vector boson production in association with a charm jet at the LHC. [...]
arXiv:2302.12844 ; MPP-2023-37 ; ZU-TH 12/23 ; IPPP/23/09 ; CERN-TH-2023-034. - 22 p.
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