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CERN Document Server Sök i 14 journaler efter:  1 - 10nästa  gå till journal: Sökningen tog 0.60 sekunder. 
1.
Implications of LHC searches for Higgs--portal dark matter / Djouadi, Abdelhak (Orsay, LPT ; CERN) ; Lebedev, Oleg (DESY) ; Mambrini, Yann (Orsay, LPT) ; Quevillon, Jeremie (Orsay, LPT)
The search for the a Standard Model Higgs boson at the LHC is reaching a critical stage as the possible mass range for the particle has become extremely narrow and some signal at a mass of about 125 GeV is starting to emerge. We study the implications of these LHC Higgs searches for Higgs portal models of dark matter in a rather model independent way. [...]
DESY-11-240; LPT-ORSAY-11-117; arXiv:1112.3299.- 2012-03-13 - 5 p. - Published in : Phys. Lett. B 709 (2012) 65-69 Preprint: PDF;
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2.
Vector Higgs-portal dark matter and the invisible Higgs / Lebedev, Oleg (DESY) ; Lee, Hyun Min (CERN) ; Mambrini, Yann (Orsay, LPT)
The Higgs sector of the Standard Model offers a unique probe of the hidden sector. In this work, we explore the possibility of renormalizable Higgs couplings to the hidden sector vector fields which can constitute dark matter (DM). [...]
arXiv:1111.4482; CERN-PH-TH-2011-271; DESY-11-202; LPT-Orsay-11-90.- 2012 - 8 p. - Published in : Phys. Lett. B 707 (2012) 570-576 External link: Preprint
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3.
Higgs Portal Inflation / Lebedev, Oleg (DESY) ; Lee, Hyun Min (CERN)
The Higgs sector of the Standard Model offers a unique opportunity to probe the hidden sector. The Higgs squared operator is the only dimension two operator which is Lorentz and gauge invariant. [...]
arXiv:1105.2284; DESY-11-075; CERN-PH-TH-2011-106; CERN-PH-TH-2011-106.- 2011 - 21 p. - Published in : Eur. Phys. J. C 71 (2011) 1821 Fulltext: PDF; External link: Preprint
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4.
Heterotic mini-landscape (II) : completing the search for MSSM vacua in a $Z_6$ orbifold / Lebedev, Oleg (CERN) ; Nilles, Hans Peter (Bonn U.) ; Ramos-Sanchez, Saul (Bonn U.) ; Ratz, Michael (Munich, Tech. U.) ; Vaudrevange, Patrick K.S. (Bonn U.)
We complete our search for MSSM vacua in the Z_6-II heterotic orbifold by including models with 3 Wilson lines. We estimate the total number of inequivalent models in this orbifold to be 10^7. [...]
arXiv:0807.4384; CERN-PH-TH-2008-157; TUM-HEP-692-08; CERN-PH-TH-2008-157; TUM-HEP 692-08.- Geneva : CERN, 2008 - 12 p. - Published in : Phys. Lett. B 668 (2008) 331-335 Fulltext: PDF; External link: Preprint
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5.
Against Tachyophobia / Ellis, Jonathan Richard (CERN) ; Giedt, Joel (Rensselaer Poly.) ; Lebedev, Oleg (CERN) ; Olive, Keith (Minnesota U., Theor. Phys. Inst.) ; Srednicki, Mark (UC, Santa Barbara)
We examine the possible extension of the parameter space of the minimal supersymmetric extension of the Standard Model (MSSM), as expressed via the renormalization-group equations in terms of universal soft supersymmetry-breaking terms at the unification scale, to include tachyonic input scalar masses. Many models with negative masses-squared for scalars at the unification scale may be viable because the small sizes of the masses-squared allow them to change signs during the renormalization-group evolution to the electroweak scale. [...]
arXiv:0806.3648; CERN-PH-TH-2008-135.- 2008 - 24 p. - Published in : Phys. Rev. D 78 (2008) 075006 APS Published version, local copy: PDF; External link: Fulltext
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6.
Higgs-dependent Yukawa couplings / Giudice, Gian Francesco (CERN) ; Lebedev, Oleg (CERN)
We consider the possibility that the Yukawa couplings depend on the Higgs field, with the motivation of generating the fermion mass hierarchy through appropriate powers of the Higgs vacuum expectation value. This leads to drastic modifications of the Higgs branching ratios, new Higgs contributions to various flavor-violating processes, and observable rates for the top quark decay t-> hc. [...]
arXiv:0804.1753; CERN-PH-TH-2008-069.- 2008 - 18 p. - Published in : Phys. Lett. B 665 (2008) 79-85 External link: Fulltext
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7.
Heterotic Road to the MSSM with R parity / Lebedev, Oleg (CERN) ; Nilles, Hans Peter (Bonn U.) ; Raby, Stuart (Ohio State U.) ; Ramos-Sanchez, Saul (Bonn U.) ; Ratz, Michael (Munich, Tech. U.) ; Vaudrevange, Patrick K.S. (Bonn U.) ; Wingerter, Akin (Ohio State U.)
In a previous paper, referred to as a "Mini-Landscape" search, we explored a "fertile patch" of the heterotic landscape based on a Z6-II orbifold with SO(10) and E6 local GUT structures. In the present paper we extend this analysis. [...]
arXiv:0708.2691; CERN-PH-TH-2007-126; OHSTPY-HEP-T-07-003; TUM-HEP-673-07; CERN-PH-TH-2007-126; OHSTPY-HEP-T-07-003; TUM-HEP-673-07.- 2008 - 61 p. - Published in : Phys. Rev. D 77 (2008) 046013 APS Published version, local copy: PDF; Fulltext: PDF; External link: Preprint
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8.
Seesaw Neutrinos from the Heterotic String / Buchmuller, Wilfried (DESY) ; Hamaguchi, Koichi (Tokyo U.) ; Lebedev, Oleg (CERN) ; Ramos-Sanchez, Saul (Bonn U.) ; Ratz, Michael (Munich, Tech. U.)
We study the possibility of realizing the neutrino seesaw mechanism in the E8XE8 heterotic string. In particular, we consider its Z_6 orbifold compactifications leading to the supersymmetric standard model gauge group and matter content. [...]
hep-ph/0703078; CERN-PH-TH-2007-050; DESY-07-030; TUM-HEP-660-07; CERN-PH-TH-2007-050; DESY-07-030; TUM-HEP-660-07; DESY-2007-030.- Geneva : CERN, 2007 - 4 p. - Published in : Phys. Rev. Lett. 99 (2007) 021601 APS Published version, local copy: PDF; Access to fulltext document: PDF; Fulltext: PDF; External link: Preprint
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9.
Supersymmetric Jarlskog Invariants: the Neutrino Sector / Dreiner, Herbi K. (Bonn U.) ; Kim, Jong Soo (Bonn U.) ; Lebedev, Oleg (CERN) ; Thormeier, Marc (Saclay, SPhT)
We generalize the notion of the Jarlskog invariant to supersymmetric models with right--handed neutrinos. This allows us to formulate basis--independent necessary and sufficient conditions for CP conservation in such models..
hep-ph/0703074; CERN-PH-TH-2007-042; CERN-PH-TH-2007-042.- Geneva : CERN, 2007 - 10 p. - Published in : Phys. Rev. D 76 (2007) 015006 APS Published version, local copy: PDF; Access to fulltext document: PDF; Fulltext: PDF; External link: Preprint
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10.
Metastable Vacua in Flux Compactifications and Their Phenomenology / Lebedev, Oleg (CERN) ; Lowen, Valeri (Bonn U.) ; Mambrini, Yann (Orsay, LPT) ; Nilles, Hans Peter (Bonn U.) ; Ratz, Michael (Munich, Tech. U.)
In the context of flux compactifications, metastable vacua with a small positive cosmological constant are obtained by combining a sector where supersymmetry is broken dynamically with the sector responsible for moduli stabilization, which is known as the F-uplifting. We analyze this procedure in a model-independent way and study phenomenological properties of the resulting vacua..
hep-ph/0612035; CERN-PH-TH-2006-247; LPT-ORSAY-06-78; TUM-HEP-653-06; CERN-PH-TH-2006-247; LPT-ORSAY-2006-78; TUM-HEP-653.- Geneva : CERN, 2007 - 21 p. - Published in : JHEP 02 (2007) 063 Access to fulltext document: PDF; Fulltext: PDF; SISSA/IOP Open Access article: PDF; External link: Preprint
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CERN Document Server : Sök i 14 journaler efter:   1 - 10nästa  gå till journal:
Se också: liknande författarnamn
50 Lebedev, O
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10 Lebedev, O P
1 Lebedev, O V
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