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TH Articles

Ostatnio dodane:
2020-04-29
05:48
New result on phase shift analysis / Martin, André (CERN) ; Richard, Jean-Marc (IP2I, Lyon)
Assuming a certain continuity property, we prove, using the old results of Itzykson and Martin, that, except for an obvious ambiguity, there are only at most two amplitudes reproducing an elastic differential cross section at a given energy..
arXiv:2004.11156; CERN-TH-2020-066.- 2020-05-15 - 6 p. - Published in : Phys. Rev. D 101 (2020) 094014 Fulltext: PDF; Fulltext from Publisher: PDF; Fulltext from publisher: PDF;

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2020-03-17
04:39
Singlet night in Feynman-ville: one-loop matching of a real scalar / Haisch, Ulrich (Munich, Max Planck Inst.) ; Ruhdorfer, Maximilian (Munich, Tech. U.) ; Salvioni, Ennio (CERN) ; Venturini, Elena (Munich, Tech. U.) ; Weiler, Andreas (Munich, Tech. U.)
A complete one-loop matching calculation for real singlet scalar extensions of the Standard Model to the Standard Model effective field theory (SMEFT) of dimension-six operators is presented. We compare our analytic results obtained by using Feynman diagrams to the expressions derived in the literature by a combination of the universal one-loop effective action (UOLEA) approach and Feynman calculus. [...]
arXiv:2003.05936; CERN-TH-2020-038; TUM-HEP-1254-20.- 2020-04-24 - 20 p. - Published in : JHEP 2004 (2020) 164 Article from SCOAP3: PDF; Fulltext: PDF;

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2020-03-12
04:46
Higgs Production at NNLL$'$+NNLO using Rapidity Dependent Jet Vetoes / Gangal, Shireen (Tata Inst.) ; Gaunt, Jonathan R. (CERN) ; Tackmann, Frank J. (DESY) ; Vryonidou, Eleni (Nikhef, Amsterdam)
The rapidity-dependent jet veto observables $\mathcal{T}_{Bj}$ and $\mathcal{T}_{Cj}$ provide a tight jet veto at central rapidity, gradually transitioning to a loose veto at forward rapidities. They divide the phase space into exclusive jet bins in a different way to the traditional jet veto observable $p_{Tj}$, and are advantageous to use under harsh pile-up conditions. [...]
arXiv:2003.04323; CERN-TH-2020-036; DESY 20-035; DESY-20-035; TIFR/TH/20-7.- 2020-05-12 - 22 p. - Published in : JHEP 2005 (2020) 054 Article from SCOAP3: PDF; Fulltext: PDF;

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2020-03-10
04:43
Proton Decay: Flipped vs Unflipped SU(5) / Ellis, John (King's Coll. London ; CERN ; NICPB, Tallinn) ; Garcia, Marcos A.G. (Madrid, IFT) ; Nagata, Natsumi (Tokyo U. ; HARC, Woodlands ; Athens Academy) ; Nanopoulos, Dimitri V. (Texas A-M ; HARC, Woodlands ; Athens Academy) ; Olive, Keith A. (Minnesota U., Theor. Phys. Inst.)
We analyze nucleon decay modes in a no-scale supersymmetric flipped SU(5) GUT model, and contrast them with the predictions for proton decays via dimension-6 operators in a standard unflipped supersymmetric SU(5) GUT model. We find that these GUT models make very different predictions for the ratios $\Gamma(p \to \pi^0 \mu^+)/\Gamma(p \to \pi^0 e^+)$, $\Gamma(p \to \pi^+ \bar{\nu})/\Gamma(p \to \pi^0 e^+)$, $\Gamma(p \to K^0 e^+)/\Gamma(p \to \pi^0 e^+)$ and $\Gamma(p \to K^0 \mu^+)/\Gamma(p \to \pi^0 \mu^+)$, and that predictions for the ratios $\Gamma(p \to \pi^0 \mu^+)/\Gamma(p \to \pi^0 e^+)$ and $\Gamma(p \to \pi^+ \bar{\nu})/\Gamma(p \to \pi^0 e^+)$ also differ in variants of the flipped SU(5) model with normal- or inverse-ordered light neutrino masses. [...]
arXiv:2003.03285; KCL-PH-TH/2020-10; CERN-TH-2020-031; UT-20-03; ACT-01-20; MI-TH-206, UMN-TH-3914/20; FTPI-MINN-20/04; IFT-UAM/CSIC-20-36.- 2020-05-06 - 26 p. - Published in : JHEP 2005 (2020) 021 Article from SCOAP3: PDF; Fulltext: PDF;

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2020-03-10
04:42
Higgs-Pair Production via Gluon Fusion at Hadron Colliders: NLO QCD Corrections / Baglio, J. (CERN) ; Campanario, F. (Valencia U., IFIC ; KIT, Karlsruhe, TP) ; Glaus, S. (KIT, Karlsruhe, TP ; KIT, Karlsruhe) ; Mühlleitner, M. (KIT, Karlsruhe, TP) ; Ronca, J. (Valencia U., IFIC) ; Spira, M. (PSI, Villigen) ; Streicher, J. (Tubingen U.)
Higgs-pair production via gluon fusion is the dominant production mechanism of Higgs-boson pairs at hadron colliders. In this work, we present details of our numerical determination of the full next-to-leading-order (NLO) QCD corrections to the leading top-quark loops. [...]
arXiv:2003.03227; CERN-TH-2020-032; IFIC/20-06; FTUV-20-0301; KA-TP-01-2020, PSI-PR-20-03; KA-TP-01-2020, PSI-PR-20-03.- 2020-04-28 - 51 p. - Published in : JHEP 2004 (2020) 181 Article from SCOAP3: PDF; Fulltext: PDF;

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2020-02-27
04:40
$T\bar T$-deformation and long range spin chains / Pozsgay, Balázs (Eotvos U. ; Budapest, Tech. U.) ; Jiang, Yunfeng (CERN) ; Takács, Gábor (Budapest, Tech. U. ; Eotvos U.)
We point out that two classes of deformations of integrable models, developed completely independently, have deep connections and share the same algebraic origin. One class includes the $T\bar T$-deformation of 1+1 dimensional integrable quantum field theory and related solvable irrelevant deformations proposed recently. [...]
arXiv:1911.11118; CERN-TH-2019-200.- 2020-03-16 - 18 p. - Published in : JHEP 2003 (2020) 092 Fulltext: PDF; External link: Fulltext from publisher

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2020-02-25
04:09
Improvement, generalization, and scheme conversion of Wilson-line operators on the lattice in the auxiliary field approach / Green, Jeremy R. (CERN) ; Jansen, Karl (NIC, Zeuthen) ; Steffens, Fernanda (Bonn U.)
Nonlocal quark bilinear operators connected by link paths are used for studying parton distribution functions (PDFs) and transverse momentum-dependent PDFs of hadrons using lattice QCD. The nonlocality makes it difficult to understand the renormalization and improvement of these operators using standard methods. [...]
arXiv:2002.09408; CERN-TH-2020-028.- 2020-04-16 - 13 p. - Published in : Phys. Rev. D 101 (2020) 074509 Article from SCOAP3: PDF; Fulltext: PDF;

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2020-02-21
04:32
Beyond the Starobinsky model for inflation / Cheong, Dhong Yeon (Yonsei U.) ; Lee, Hyun Min (Chung-Ang U. ; CERN) ; Park, Seong Chan (Yonsei U.)
We single out the Starobinsky model and its extensions among generic $f(R)$ gravity as attractors at large field values for chaotic inflation. Treating a $R^3$ curvature term as a perturbation of the Starobinsky model, we impose the phenomenological bounds on the additional term satisfying the successful inflationary predictions. [...]
arXiv:2002.07981; YHEP-COS20-04; CAU-THEP-2020-02; CERN-TH-2020-022.- 2020-06-10 - 8 p. - Published in : Phys. Lett. B 805 (2020) 135453 Article from SCOAP3: PDF; Fulltext: PDF;

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2020-02-21
04:32
Chaotic inflation with four-form couplings / Lee, Hyun Min (Chung-Ang U.)
We consider chaotic inflation models with a pseudo-scalar field containing the general couplings to the four-form flux. The four-form mixing with the pseudo-scalar field induces a quadratic potential for inflaton while the coexisting four-form mixing with graviton generates a non-minimal gravity coupling for inflaton. [...]
arXiv:1908.05475; CERN-TH-2019-228.- 2020-02-20 - 6 p. - Published in : Phys. Rev. D 101 (2020) 043523 Article from SCOAP3: PDF; Fulltext: PDF;

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2020-02-21
04:32
Relaxation of Higgs mass and cosmological constant with four-form fluxes and reheating / Lee, Hyun Min (Chung-Ang U.)
We consider the most general effective action for the four-form fluxes in the Standard Model coupled to gravity. The Higgs mass parameter can be relaxed to a correct value due to the four-form coupling to the Higgs field and it stops changing due to an extremely suppressed transition probability from the observed cosmological constant to AdS space. [...]
arXiv:1908.04252; CERN-PH-TH/2019-196; CERN-TH-2019-196.- 2020-01-08 - 14 p. - Published in : JHEP 2001 (2020) 045 Article from SCOAP3: PDF; Fulltext: PDF;

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