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CERN Document Server 2,048 записей найдено  1 - 10следующийконец  перейти к записи: Поиск длился 0.37 секунд. 
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Flavor Symmetries and Automatic Enhancement in the 6d Supergravity Swampland / Cvetic, Mirjam (Pennsylvania U. ; Maribor U. ; CERN) ; Lin, Ling (CERN) ; Turner, Andrew P. (Pennsylvania U.)
We argue for the quantum-gravitational inconsistency of certain 6d $\mathcal{N}=(1,0)$ supergravity theories, whose anomaly-free gauge algebra $\mathfrak{g}$ and hypermultiplet spectrum $M$ were observed in arxiv:2012.01437 to be realizable only as part of a larger gauge sector $(\mathfrak{g}' \supset \mathfrak{g}, M' \supset M)$ in F-theory. To detach any reference to a string theoretic method of construction, we utilize flavor symmetries to provide compelling reasons why the vast majority of such $(\mathfrak{g},M)$ theories are not compatible with quantum gravity constraints, and how the "automatic enhancement" to $(\mathfrak{g}', M')$ remedies this. [...]
arXiv:2110.00008; CERN-TH-2021-144; UPR-1315-T.- 2022-02-08 - 30 p. - Published in : Phys. Rev. D 105 (2022) 046005 Fulltext: PDF;
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One Loop to Rule Them All: Eight and Nine Dimensional String Vacua from Junctions / Cvetič, Mirjam (Pennsylvania U. ; Maribor U. ; CERN) ; Dierigl, Markus (Munich U., ASC) ; Lin, Ling (CERN) ; Zhang, Hao Y. (Pennsylvania U.)
String and 5-brane junctions are shown to succinctly classify all known 8d ${\cal N}$=1 string vacua. This requires an extension of the description for ordinary $[p,q]$-7-branes to consistently include O7$^+$-planes, which then naturally encodes the dynamics of $\mathfrak{sp}_n$ gauge algebras, including their higher-form center symmetries. [...]
arXiv:2203.03644; CERN-TH-2022-032; LMU-ASC 10/22; UPR-1316-T.- 2022-07-15 - 44 p. - Published in : Phys. Rev. D Fulltext: PDF;
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Generic Tests of <math display="inline"><mi>C</mi><mi>P</mi></math> Violation in High-<math display="inline"><msub><mi>p</mi><mi>T</mi></msub></math> Multilepton Signals at the LHC and Beyond / Afik, Yoav (CERN) ; Bar-Shalom, Shaouly (Technion) ; Pal, Kuntal (UC, Riverside) ; Soni, Amarjit (Brookhaven) ; Wudka, Jose (UC, Riverside)
We introduce a modification to the standard expression for tree-level CP-violation in scattering processes at the LHC, which is important when the initial state in not self-conjugate. Based on that, we propose a generic and model-independent search strategy for probing tree-level CP-violation in inclusive multi-lepton signals. [...]
arXiv:2212.09433.- 2023-10-23 - 8 p. - Published in : Phys. Rev. Lett. 131 (2023) 171801 Fulltext: 2212.09433 - PDF; Publication - PDF;
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Universal Feature of Charged Entanglement Entropy / Bueno, Pablo (CERN) ; Cano, Pablo A. (Leuven U.) ; Murcia, Ángel (Madrid, IFT) ; Rivadulla Sánchez, Alberto (Santiago de Compostela U.)
Rényi entropies, $S_n$, admit a natural generalization in the presence of global symmetries. These "charged Rényi entropies" are functions of the chemical potential $\mu$ conjugate to the charge contained in the entangling region and reduce to the usual notions as $\mu\rightarrow 0$. [...]
arXiv:2203.04325; IFT-UAM/CSIC-22-18; CERN-TH-2022-033.- 2022-07-06 - 13 p. - Published in : Phys. Rev. Lett. 129 (2022) 021601 Fulltext: PhysRevLett.129.021601 - PDF; 2203.04325 - PDF;
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Open charm tetraquarks in broken SU(3)_F symmetry / Maiani, L. (Rome U. ; CERN) ; Polosa, A.D. (Rome U.) ; Riquer, V. (Rome U. ; CERN)
Prompted by a recent lattice QCD calculation, we review the SU(3) light quark flavor structure of charmed tetraquarks with spin-0 diquarks. Fermi statistics forces the three light quarks to be in the representation 3*x3*= 3+6*. [...]
arXiv:2405.08545.- 2024-08-01 - 6 p. - Published in : Phys. Rev. D 110 (2024) 034014 Fulltext: Publication - PDF; 2405.08545 - PDF;
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Gauge group topology of 8D Chaudhuri-Hockney-Lykken vacua / Cvetic, Mirjam (Pennsylvania U. ; Maribor U.) ; Dierigl, Markus (Munich U., ASC) ; Lin, Ling (CERN) ; Zhang, Hao Y. (Pennsylvania U.)
Compactifications of the CHL string to eight dimensions can be characterized by embeddings of root lattices into the rank 12 momentum lattice $\Lambda_M$, the so-called Mikhailov lattice. Based on this data, we devise a method to determine the global gauge group structure including all $U(1)$ factors. [...]
arXiv:2107.04031; CERN-TH-2021-104; UPR-1313-T; LMU-ASC 19/21.- 2021-10-12 - 29 p. - Published in : Phys. Rev. D 104 (2021) 086018 Fulltext: 2107.04031 - PDF; Fulltext - PDF;
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Universal Pattern in Quantum Gravity at Infinite Distance / Castellano, Alberto (Madrid, Autonoma U. ; Madrid, IFT) ; Ruiz, Ignacio (Madrid, Autonoma U. ; Madrid, IFT) ; Valenzuela, Irene (Madrid, IFT ; Madrid, Autonoma U. ; CERN)
Quantum gravitational effects become significant at a cut-off species scale that can be much lower than the Planck scale whenever we get a parametrically large number of fields becoming light. This is expected to occur at any perturbative limit of an effective field theory coupled to gravity, or equivalently, at any infinite distance limit in the field space of the quantum gravity completion. [...]
arXiv:2311.01501.- 2024-05-02 - 7 p. - Published in : Phys. Rev. Lett. 132 (2024) 181601 Fulltext: 2311.01501 - PDF; Publication - PDF;
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Search for a light Higgs boson in single-photon decays of $\Upsilon(1S)$ using $\Upsilon(2S) \to \pi^+ \pi^- \Upsilon(1S)$ tagging method / Belle Collaboration
We search for a light Higgs boson ($A^0$) decaying into a $\tau^+\tau^-$ or $\mu^+\mu^-$ pair in the radiative decays of $\Upsilon(1S)$. The production of $\Upsilon(1S)$ mesons is tagged by $\Upsilon(2S)\to \pi^+ \pi^- \Upsilon(1S)$ transitions, using 158 million $\Upsilon(2S)$ events accumulated with the Belle detector at the KEKB asymmetric energy electron-positron collider. [...]
arXiv:2112.11852; Belle Preprint 2021-30; KEK Preprint 2021-35.- 2022-02-23 - 9 p. - Published in : Phys. Rev. Lett. 128 (2022) 081804 Fulltext: PDF;
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Forward-backward asymmetry in $B\to D^{*}\ell\nu$: One more hint for scalar leptoquarks? / Carvunis, Alexandre (Annecy, LAPTH) ; Crivellin, Andreas (CERN ; Zurich U. ; PSI, Villigen) ; Guadagnoli, Diego (CERN ; Annecy, LAPTH) ; Gangal, Shireen (Annecy, LAPTH)
Experimental data have provided intriguing hints for the violation of lepton flavour universality (LFU), including $B\to D^{(*)}\tau\nu/B\to D^{(*)}\ell\nu$, the anomalous magnetic moment of the muon and $b\!\to\! s\ell^+\ell^-$ with a significance of $\!>3\,\sigma$, $>\!4\,\sigma$ and $>\!5\,\sigma$, respectively. Furthermore, in a recent re-analysis of 2018 Belle data, it was found that the forward-backward asymmetry ($\Delta A_{\rm FB}$) of $B \to D^{*}\mu\bar \nu$ vs $B\to D^{*}e\bar \nu$ disagrees with the SM prediction by $\approx\!\!4\,\sigma$, providing an additional sign of LFU violation. [...]
arXiv:2106.09610; CERN-TH-2021-092; LAPTH-020/21; PSI-PR-21-12; ZU-TH 27/21.- 2022-02-01 - 7 p. - Published in : Phys. Rev. D 105 (2022) L031701 Fulltext: PhysRevD.105.L031701 - PDF; 2106.09610 - PDF;
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Probing Neutral Triple Gauge Couplings at the LHC and Future Hadron Colliders / Ellis, John (King's Coll. London ; CERN ; NICPB, Tallinn ; Tsung-Dao Lee Inst., Shanghai ; SKLPPC, Shanghai) ; He, Hong-Jian (Tsung-Dao Lee Inst., Shanghai ; SKLPPC, Shanghai ; Tsinghua U., Beijing ; Tsinghua U., Beijing, CHEP) ; Xiao, Rui-Qing (King's Coll. London ; Tsung-Dao Lee Inst., Shanghai ; SKLPPC, Shanghai)
We study probes of neutral triple gauge couplings (nTGCs) at the LHC and the proposed 100TeV $pp$ colliders, and compare their sensitivity reaches with those of the proposed $e^+ e^-$ colliders. The nTGCs provide a unique window to the new physics beyond the Standard Model (SM) because they can arise from SM effective field theory (SMEFT) operators that respect the full electroweak gauge group $SU(2)_L\otimes U(1)_Y$ of the SM only at the level of dimension-8 or higher. [...]
arXiv:2206.11676; KCL-PH-TH/2022-35; CERN-TH-2022-089.- 2023-02-01 - 57 p. - Published in : Phys. Rev. D 107 (2023) 035005 Fulltext: 2206.11676 - PDF; Publication - PDF;
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