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TH Preprints

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2024-09-14
04:38
Two-loop amplitudes for $\mathcal{O}(\alpha_s^2)$ corrections to $W\gamma\gamma$ production at the LHC / Badger, Simon (INFN, Turin) ; Hartanto, Heribertus Bayu (APCTP, Pohang ; POSTECH) ; Wu, Zihao (HIAS, UCAS, Hangzhou ; Unlisted, CN) ; Zhang, Yang (Hefei, CUST ; PCFT, Hefei) ; Zoia, Simone (PCFT, Hefei)
We present the two-loop helicity amplitudes contributing to the next-to-next-to-leading order QCD predictions for W-boson production in association with two photons at the Large Hadron Collider. [...]
CERN-TH-2024-146 ; USTC-ICTS/PCFT-24-29 ; arXiv:2409.08146. - 31 p.
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2024-09-12
04:37
Theoretical implications for a new measurement of $K_L\to \pi^0 \ell\ell$ / D'Ambrosio, G. (Guglielmo Marconi U. ; U. Rome 2, Tor Vergata (main) ; INFN, Naples) ; Iyer, A.M. (Indian Inst. Tech., New Delhi ; IP2I, Lyon) ; Mahmoudi, F. (IP2I, Lyon ; CERN ; IUF, Paris) ; Neshatpour, S. (IP2I, Lyon)
Kaon physics is at an important experimental juncture with respect to the ongoing measurements of several observables. [...]
CERN-TH-2024-150 ; arXiv:2409.06545. - 14 p.
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2024-09-12
04:15
Dielectric Haloscopes as Gravitational Wave Detectors / Domcke, Valerie (CERN) ; Ellis, Sebastian A.R. (Geneva U., Dept. Theor. Phys.) ; Kopp, Joachim (CERN ; Mainz U.)
We argue that dielectric haloscopes like MADMAX, originally designed for detecting axion dark matter, are also very promising gravitational wave detectors. [...]
CERN-TH-2024-151 ; arXiv:2409.06462. - 8 p.
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2024-09-07
04:55
Polarized and un-polarized $\mathcal{R}_{K^*}$ in and beyond the SM / Ahmed, Ishtiaq (COMSATS, Islamabad ; CERN) ; Shafaq, Saba (Int. Islamic U., Islamabad) ; Aslam, M. Jamil (Quaid-i-Azam U.) ; Ishaq, Saadi (NUST, Islamabad)
The Standard Model (SM) is lepton flavor universal, and the recent measurements of lepton flavor universality in $B \to (K,K^*)\ell^{+}\ell^{-}$, for $\ell = \mu, \; e$, decays now lie close to the SM predictions. [...]
CERN-TH-2024-148 ; arXiv:2409.03388. - 18 p.
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2024-08-30
06:38
R-matrices and Miura operators in 5d Chern-Simons theory / Ishtiaque, Nafiz (IHES, Bures-sur-Yvette) ; Jeong, Saebyeok (CERN) ; Zhou, Yehao (Tokyo U., IPMU)
We derive Miura operators for $W$- and $Y$-algebras from first principles as the expectation value of the intersection between a topological line defect and a holomorphic surface defect in 5-dimensional non-commutative $\mathfrak{gl}(1)$ Chern-Simons theory. [...]
CERN-TH-2024-147 ; arXiv:2408.15712. - 14 p.
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2024-08-30
06:21
Probing Lorentz invariance with a high-energy neutrino flare / Bustamante, Mauricio (Bohr Inst.) ; Ellis, John (King's Coll. London ; CERN) ; Konoplich, Rostislav (Manhattan Coll., Riverdale ; New York U.) ; Sakharov, Alexander S. (Manhattan Coll., Riverdale ; CERN)
Time-of-flight measurements of high-energy astrophysical neutrinos can be used to probe Lorentz invariance, a pillar of modern physics. [...]
KCL-PH-TH/2024-22 ; CERN-TH-2024-056 ; arXiv:2408.15949. - 16 p.
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2024-08-28
04:59
Can Baby Universe Absorption Explain Dark Energy? / Muralidharan, Varun ; Cline, James M.
It has been proposed that the accelerated expansion of the universe can be explained by the merging of our universe with baby universes, resulting in dark energy with a phantom-like equation of state. [...]
CERN-TH-2024-137 ; arXiv:2408.13306. - 7 p.
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2024-08-28
04:54
Gravitational Waves from High Temperature Strings / Frey, Andrew R. (Winnipeg U.) ; Mahanta, Ratul (Winnipeg U.) ; Maharana, Anshuman (Harish-Chandra Res. Inst.) ; Quevedo, Fernando (Cambridge U., DAMTP ; CERN ; New York U., Abu Dhabi) ; Villa, Gonzalo (Cambridge U., DAMTP)
We study finite temperature effects in string cosmology and their potential gravitational wave signature. [...]
arXiv:2408.13803 ; CERN-TH-2024-108. - 43 p.
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2024-08-27
04:09
The Standard Model CP Violation is Enough / Elor, Gilly (Texas U.) ; Houtz, Rachel (Florida U. ; CERN) ; Ipek, Seyda (Ottawa Carleton Inst. Phys.) ; Ulloa, Martha (Florida U.)
Is the Standard Model Charge-Parity (CP) violation ever enough to generate the observed baryon asymmetry? Yes! We introduce a mechanism of baryogenesis (and dark matter production) that can generate the entire observed baryon asymmetry of the Universe using $\textit{only}$ the CP violation within Standard Model systems -- a fête which no other mechanism currently proposed can achieve. [...]
CERN-TH-2024-144 UT-WI-28-2024 ; CERN-TH-2024-144 ; arXiv:2408.12647. - 1 p.
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2024-08-24
06:17
UV Completion of Neutral Triple Gauge Couplings / Ellis, John (Shanghai Jiaotong U. ; King's Coll. London ; CERN) ; He, Hong-Jian (Shanghai Jiaotong U. ; Shanghai Jiao Tong U. ; Tsinghua U., Beijing ; Peking U., CHEP) ; Xiao, Rui-Qing (Shanghai Jiaotong U. ; King's Coll. London ; Shanghai Jiao Tong U.) ; Zeng, Shi-Ping (Shanghai Jiaotong U. ; Shanghai Jiao Tong U.) ; Zheng, Jiaming (Shanghai Jiaotong U. ; Shanghai Jiao Tong U.)
Neutral triple gauge couplings (nTGCs) are manifestation of new physics beyond the Standard Model (SM), as they are absent in the SM and are first generated by dimension-8 operators in the SM Effective Field Theory (SMEFT). [...]
KCL-PH-TH/2024-45 ; CERN-TH-2024-143 ; arXiv:2408.12508. - 26 p, 26 p.
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