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2021-10-20
11:52
Tests of lepton universality using $B^0\to K^0_S \ell^+ \ell^-$ and $B^+\to K^{*+}\ell^+\ell^-$ decays
Tests of lepton universality in $B^0\to K^0_S \ell^+ \ell^-$ and $B^+\to K^{*+}\ell^+\ell^-$ decays where $\ell$ is either an electron or a muon are presented. [...]
CERN-EP-2021-208 ; arXiv:2110.09501 ; LHCB-PAPER-2021-038. - 2021.
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2021-10-20
09:50
Beam Instabilities in Circular Particle Accelerators / Metral, Elias (CERN)
The theory of impedance-induced bunched-beam coherent instabilities is reviewed following Laclare's formalism, adding the effect of an electronic damper in the transverse plane. [...]
CERN-ACC-SLIDES-2021-0001. - 2021.

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2021-10-20
04:23
Thin Film (High Temperature) Superconducting Radiofrequency Cavities for the Search of Axion Dark Matter / Golm, J. (CERN) ; Arguedas Cuendis, S.  (CERN) ; Calatroni, S. (CERN) ; Cogollos, C. (ICC, Barcelona U.) ; Döbrich, B. (CERN) ; Gallego, J.D. (Yebes Astron. Ctr.) ; García Barceló, J.M.  (Cartagena Politecnica U.) ; Granados, X. (Barcelona, Autonoma U.) ; Gutierrez, J. (Barcelona, Autonoma U.) ; Irastorza, I.G. (Zaragoza U.) et al.
The axion is a hypothetical particle which is a candidate for cold dark matter. [...]
arXiv:2110.01296. - 5 p.
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2021-10-20
04:14
Account of baryonic feedback effect in the $\gamma$-ray measurements of intergalactic magnetic fields / Bondarenko, Kyrylo (CERN ; Ecole Polytechnique, Lausanne) ; Boyarsky, Alexey (Leiden U.) ; Korochkin, Alexander (APC, Paris ; Moscow, INR ; Novosibirsk State U.) ; Neronov, Andrii (APC, Paris ; U. Geneva (main)) ; Semikoz, Dmitri (APC, Paris ; Moscow, INR ; Moscow Phys. Eng. Inst.) ; Sokolenko, Anastasia (OAW, Vienna)
Intergalactic magnetic fields in the voids of the large-scale structure can be probed via measurements of secondary gamma-ray emission from gamma-ray interactions with extragalactic background light. [...]
arXiv:2106.02690. - 8 p.
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2021-10-20
04:13
Improving Variational Autoencoders for New Physics Detection at the LHC with Normalizing Flows / Jawahar, Pratik (CERN) ; Aarrestad, Thea (CERN) ; Pierini, Maurizio (CERN) ; Wozniak, Kinga A. (CERN) ; Ngadiuba, Jennifer (Fermilab) ; Duarte, Javier (UC, San Diego) ; Tsan, Steven (UC, San Diego)
We investigate how to improve new physics detection strategies exploiting variational autoencoders and normalizing flows for anomaly detection at the Large Hadron Collider. [...]
arXiv:2110.08508. - 3 p.
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2021-10-18
13:10
Search for massive long-lived particles decaying semileptonically at $\sqrt{s}=13$ TeV / LHCb Collaboration
A search is performed for massive long-lived particles (LLP) decaying semileptonically into a muon and two quarks. [...]
arXiv:2110.07293 ; LHCb-PAPER-2021-028 ; CERN-EP-2021-186 ; LHCB-PAPER-2021-028. - 2021.
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2021-10-16
04:31
Sparse Data Generation for Particle-Based Simulation of Hadronic Jets in the LHC / Orzari, Breno (SPRACE) ; Tomei, Thiago (SPRACE) ; Pierini, Maurizio (CERN) ; Touranakou, Mary (CERN ; Athens Natl. Capodistrian U.) ; Duarte, Javier (UC, San Diego (main)) ; Kansal, Raghav (UC, San Diego (main)) ; Vlimant, Jean-Roch (Caltech, Pasadena (main)) ; Gunopulos, Dimitrios (Athens Natl. Capodistrian U.)
We develop a generative neural network for the generation of sparse data in particle physics using a permutation-invariant and physics-informed loss function. [...]
arXiv:2109.15197. - 4 p.
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2021-10-16
04:27
Leading-Color Two-Loop Amplitudes for Four Partons and a W Boson in QCD / Abreu, S. (CERN ; U. Edinburgh, Higgs Ctr. Theor. Phys. ; UCLA) ; Cordero, F. Febres ; Ita, H. ; Klinkert, M. ; Page, B. (CERN) ; Sotnikov, V. (Munich, Max Planck Inst.)
We present the leading-color two-loop QCD corrections for the scattering of four partons and a $W$ boson, including its leptonic decay. [...]
arXiv:2110.07541 ; CERN-TH-2021-156 ; FR-PHENO-2021-12 ; MPP-2021-181. - 31 p.
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2021-10-16
04:22
Multinucleon excitations in neutrino-nucleus scattering: connecting different microscopic models for the correlations / Chanfray, G. (IP2I, Lyon) ; Ericson, M. (IP2I, Lyon ; CERN) ; Martini, M. (IPSA, Paris ; Paris U., VI-VII)
The problem of nucleon-nucleon correlations and meson exchange currents has been vividly debated in connection with the neutrino-nucleus cross sections. [...]
arXiv:2109.13550. - 34 p.
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2021-10-16
04:12
Gegenbauer Goldstones / Durieux, Gauthier (CERN) ; McCullough, Matthew (CERN) ; Salvioni, Ennio (CERN ; U. Padua, Dept. Phys. Astron. ; INFN, Padua)
We investigate radiatively stable classes of pseudo-Nambu-Goldstone boson (pNGB) potentials for approximate spontaneously broken $\mathrm{SO}(N+1)\to\mathrm{SO}(N)$. [...]
arXiv:2110.06941 ; CERN-TH-2021-141. - 20 p.
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