1.
|
Infinitely many inequivalent field theories from one Lagrangian
/ Bender, Carl M. (Washington U., St. Louis ; King's Coll. London ; London, City U.) ; Hook, Daniel W. (Washington U., St. Louis ; Imperial Coll., London) ; Mavromatos, Nick E. (King's Coll. London ; CERN) ; Sarkar, Sarben (King's Coll. London)
Logarithmic time-like Liouville quantum field theory has a generalized PT invariance, where T is the time-reversal operator and P stands for an S-duality reflection of the Liouville field $\phi$. In Euclidean space the Lagrangian of such a theory, $L=\frac{1}{2}(\nabla\phi)^2-ig\phi\exp(ia\phi)$, is analyzed using the techniques of PT-symmetric quantum theory. [...]
arXiv:1408.2432; PREPRINT-KCL-PH-TH-2014-27; LCTS-2014-26; PREPRINT KCL-PH-TH-2014-27.-
2014-12-03 - 5 p.
- Published in : Phys. Rev. Lett. 113 (2014) 231605
Fulltext: PDF; External link: Preprint
|
|
2.
|
$\mathbb R^3$ Index for Four-Dimensional $N=2$ Field Theories
/ Alexandrov, Sergei (Montpellier U.) ; Moore, Gregory W. (Rutgers U., Piscataway) ; Neitzke, Andrew (U. Texas, Austin (main)) ; Pioline, Boris (CERN ; UPMC, Paris (main))
In theories with $N=2$ supersymmetry on $R^{3,1}$, BPS bound states can decay across walls of marginal stability in the space of Coulomb branch parameters, leading to discontinuities in the BPS indices $\Omega(\gamma,u)$. We consider a supersymmetric index $I$ which receives contributions from 1/2-BPS states, generalizing the familiar Witten index $Tr (-1)^F e^{-\beta H}$. [...]
arXiv:1406.2360; LPTA-14-023; CERN-PH-TH-2014-100; LPTA-14-023; CERN-PH-TH-2014-100.-
2015-03-23 - 7 p.
- Published in : Phys. Rev. Lett. 114 (2015) 121601
APS Open Access article: PDF; Fulltext: PDF; External link: Preprint
|
|
3.
|
Electroweak and supersymmetry breaking from the Higgs discovery
/ Delgado, Antonio (Notre Dame U. ; Santa Barbara, KITP) ; Garcia, Mateo (Barcelona, IFAE) ; Quiros, Mariano (Santa Barbara, KITP ; CERN ; ICREA, Barcelona ; Barcelona, IFAE)
We will explore the consequences on the electroweak breaking condition, the mass of supersymmetric partners and the scale at which supersymmetry is broken, for arbitrary values of the supersymmetric parameters tan(beta) and the stop mixing X_t, which follow from the Higgs discovery with a mass m_H\simeq 126 GeV at the LHC. Within the present uncertainty on the top quark mass we deduce that radiative breaking requires tan(beta) \gtrsim 7 for maximal mixing X_t\simeq \sqrt{6}, and tan(beta) \gtrsim 20 for small mixing X_t\lesssim 1. [...]
arXiv:1312.3235; CERN-PH-TH-2013-301; NSF-KITP-13-258; UAB-FT-749; CERN-PH-TH-2013-301; NSF-KITP-13-258; UAB-FT-749.-
2014-07-15 - 11 p.
- Published in : Phys. Rev. D 90 (2014) 015016
APS published version, local copy: PDF; Fulltext: PDF; External link: Preprint
|
|
4.
|
|
5.
|
|
6.
|
SUSY naturalness without prejudice
/ Ghilencea, D.M. (CERN ; Bucharest, IFIN-HH)
Unlike the Standard Model (SM), supersymmetric models stabilize the electroweak (EW) scale $v$ at the quantum level and {\it predict} that $v$ is a function of the TeV-valued SUSY parameters ($\gamma_\alpha$) of the UV Lagrangian. We show that the (inverse of the) covariance matrix of the model in the basis of these parameters and the usual deviation $\delta\chi^2$ (from $\chi^2_{min}$ of a model) automatically encode information about the "traditional" EW fine-tuning measuring this stability, {\it provided that} the EW scale $v\sim m_Z$ is indeed regarded as a function $v=v(\gamma)$. [...]
arXiv:1311.6144; CERN-PH-TH-2013-271; CERN-PH-TH-2013-271.-
2014-05-08 - 8 p.
- Published in : Phys. Rev. D 89 (2014) 095007
APS published version, local copy: PDF; Fulltext: PDF; External link: Preprint
|
|
7.
|
|
8.
|
B_{s,d} -> l+ l- in the Standard Model
/ Bobeth, Christoph (Munich, Tech. U.) ; Gorbahn, Martin (Liverpool U., Dept. Math. ; Munich, Tech. U.) ; Hermann, Thomas (KIT, Karlsruhe, TTP) ; Misiak, Mikolaj (Warsaw U. ; CERN) ; Stamou, Emmanuel (Munich, Tech. U. ; Weizmann Inst.) ; Steinhauser, Matthias (KIT, Karlsruhe, TTP)
We combine our new results for the O(alpha_em) and O(alpha_s^2) corrections to B_{s,d} -> l^+ l^-, and present updated branching ratio predictions for these decays in the standard model. Inclusion of the new corrections removes major theoretical uncertainties of perturbative origin that have just begun to dominate over the parametric ones. [...]
arXiv:1311.0903; FLAVOUR(267104)-ERC-53; LTH-990; SFB-CPP-13-82; TTP13-033; FLAVOUR(267104)-ERC-53; LTH 990; SFB-CPP-13-82; TTP13-033.-
2014-03-11 - 4 p.
- Published in : Phys. Rev. Lett. 112 (2014) 101801
Fulltext: PDF; External link: Preprint
|
|
9.
|
|
10.
|
Catching sparks from well-forged neutralinos
/ Bramante, Joseph (Notre Dame U.) ; Delgado, Antonio (Notre Dame U. ; CERN) ; Elahi, Fatemeh (Notre Dame U.) ; Martin, Adam (Notre Dame U.) ; Ostdiek, Bryan (Notre Dame U.)
In this paper we present a new search technique for electroweakinos, the superpartners of electroweak gauge and Higgs bosons, based on final states with missing transverse energy, a photon, and a dilepton pair, $\ell^+\,\ell^- + \gamma + \displaystyle{\not} E_T$. Unlike traditional electroweakino searches, which perform best when $m_{\widetilde{\chi}^0_{2,3}} - m_{\widetilde{\chi}^0_1}, m_{\widetilde{\chi}^{\pm}} - m_{\widetilde{\chi}^0_1} > m_Z$, our search favors nearly degenerate spectra; degenerate electroweakinos typically have a larger branching ratio to photons, and the cut $m_{\ell\ell} \ll m_Z$ effectively removes on-shell Z boson backgrounds while retaining the signal. [...]
arXiv:1408.6530; CERN-PH-TH-2014-164; CERN-PH-TH-2014-164.-
2014-11-11 - 17 p.
- Published in : Phys. Rev. D 90 (2014) 095008
Fulltext: PDF; External link: Preprint
|
|