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CERN Document Server Znaleziono 2,009 rekordów  1 - 10następnykoniec  skocz do rekordu: Szukanie trwało 0.53 sekund. 
1.
(100)
Natural SUSY Predicts: Higgs Couplings / Blum, Kfir (Princeton, Inst. Advanced Study) ; D'Agnolo, Raffaele Tito (CERN ; Pisa, Scuola Normale Superiore ; INFN, Pisa ; Princeton, Inst. Advanced Study) ; Fan, JiJi (Princeton U.)
We study Higgs production and decays in the context of natural SUSY, allowing for an extended Higgs sector to account for a 125 GeV lightest Higgs boson. Under broad assumptions, Higgs observables at the LHC depend on at most four free parameters with restricted numerical ranges. [...]
arXiv:1206.5303.- 2013 - 31 p. - Published in : JHEP 01 (2013) 057 Fulltext: PDF; Springer Open Access article: PDF; External link: Preprint
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2.
(73)
2:1 for Naturalness at the LHC? / Arkani-Hamed, Nima (Princeton, Inst. Advanced Study) ; Blum, Kfir (Princeton, Inst. Advanced Study) ; D'Agnolo, Raffaele Tito (Pisa, Scuola Normale Superiore ; INFN, Pisa ; CERN) ; Fan, JiJi (Princeton U.)
A large enhancement of a factor of 1.5 - 2 in Higgs production and decay in the diphoton channel, with little deviation in the ZZ channel, can only plausibly arise from a loop of new charged particles with large couplings to the Higgs. We show that, allowing only new fermions with marginal interactions at the weak scale, the required Yukawa couplings for a factor of 2 enhancement are so large that the Higgs quartic coupling is pushed to large negative values in the UV, triggering an unacceptable vacuum instability far beneath the 10 TeV scale. [...]
arXiv:1207.4482.- 2013 - 18 p. - Published in : JHEP 01 (2013) 149 Fulltext: PDF; Springer Open Access article: PDF; External link: Preprint
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3.
(59)
Haggling over the fine-tuning price of LEP / Chankowski, Piotr H. (UC, Santa Cruz ; Warsaw U.) ; Ellis, John R. (CERN) ; Olechowski, Marek (Munich, Tech. U. ; Warsaw U.) ; Pokorski, Stefan (CERN ; Warsaw U.)
We amplify previous discussions of the fine-tuning price to be paid by supersymmetric models in the light of LEP data, especially the lower bound on the Higgs boson mass, studying in particular its power of discrimination between different parameter regions and different theoretical assumptions. The analysis is performed using the full one-loop effective potential. [...]
hep-ph/9808275; CERN-TH-98-119; IFT-98-22; SCIPP-98-30; SFB-375-305; TUM-HEP-324-98; CERN-TH-98-119; IFT-98-22; SCIPP-98-30; SFB-375-305; TUM-HEP-324.- Geneva : CERN, 1999 - 34 p. - Published in : Nucl. Phys. A 544 (1999) 39 Access to fulltext document: PDF; Fulltext: PDF; External link: hep-ph/9808275 PDF
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4.
(57)
Precise determination of the Higgs mass in supersymmetric models with vectorlike tops and the impact on naturalness in minimal GMSB / Nickel, Kilian (Bonn U.) ; Staub, Florian (CERN)
We present a precise analysis of the Higgs mass corrections stemming from vectorlike top partners in supersymmetric models. We reduce the theoretical uncertainty compared to previous studies in the following aspects: (i) including the one-loop threshold corrections to SM gauge and Yukawa couplings due to the presence of the new states to obtain the $\bar{\text{DR}}$ parameters entering all loop calculations, (ii) including the full momentum dependence at one-loop, and (iii) including all two-loop corrections but the ones involving $g_1$ and $g_2$. [...]
arXiv:1505.06077; BONN-TH-2015-07; CERN-PH-TH-2015-123; BONN-TH-2015-07; CERN-PH-TH-2015-123.- Geneva : CERN, 2015-07-27 - 64 p. - Published in : JHEP 07 (2015) 139 Article from SCOAP3: PDF; Fulltext: PDF; Springer Open Access article: PDF; External link: Preprint
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5.
(56)
One-loop analysis of the electroweak breaking in supersymmetric models and the fine-tuning problem / de Carlos, B. (Madrid, Inst. Estructura Materia) ; Casas, J.A. (CERN ; Madrid, Inst. Estructura Materia)
We examine the electroweak breaking mechanism in the minimal supersymmetric standard model (MSSM) using the {\em complete} one-loop effective potential $V_1$. First, we study what is the region of the whole MSSM parameter space (i.e. [...]
hep-ph/9303291; CERN-TH-6835-93; IEM-FT-70-93; CERN-TH-6835-93; IEM-FT-70.- Geneva : CERN, 1993 - 16 p. - Published in : Phys. Lett. B 309 (1993) 320-328 Fulltext: PS.GZ; Preprint: PDF; External link: preprint - CERN library copies
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6.
(48)
A Fat Higgs with a Fat Top / Delgado, Antonio (CERN ; Johns Hopkins U.) ; Tait, Timothy M.P. (Fermilab ; Argonne)
A new variant of the supersymmetric Fat Higgs model is presented in which the MSSM Higgses as well as the top quark are composite. The underlying theory is an s-confining SU(3) gauge theory with the MSSM gauge groups realized as gauged sub-groups of the chiral flavor symmetries. [...]
hep-ph/0504224; ANL-HEP-PR-05-18; CERN-PH-TH-2005-056; FERMILAB-PUB-05-028-T; CERN-PH-TH-2005-056.- 2005 - 17 p. - Published in : JHEP 07 (2005) 023 Fulltext: 34758934ba41839dc9dd37752b95d85e - PDF; arXiv:hep-ph_0504224 - PDF; SISSA/IOP Published version, local copy: PDF; External links: Fulltext; Fermilab Library Server (fulltext available)
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7.
(47)
Cosmological Fine Tuning, Supersymmetry, and the Gauge Hierarchy Problem / Chankowski, Piotr H. (Warsaw, CFT) ; Ellis, John R. (CERN) ; Olive, Keith A. (Minnesota U.) ; Pokorski, Stefan (Warsaw, CFT)
We study the extent to which the cosmological fine-tuning problem - why the relic density of neutralino cold dark matter particles $\chi$ is similar to that of baryons - is related to the fine-tuning aspect of the gauge hierarchy problem - how one arranges that M_W << M_P without unnatural choices of MSSM parameters. Working in the minimal supergravity framework with universal soft supersymmetry-breaking parameters as inputs, we find that the hierarchical fine tuning is minimized for \Omega_{\chi} h^2 \sim 0.1. [...]
hep-ph/9811284; CERN-TH-98-328; IFT-98-21; TPI-MINN-98-21; UMN-TH-1726-98; CERN-TH-98-328; IFT-98-21; TPI-MINN-98-21; UMN-TH-1719.- Geneva : CERN, 1999 - 16 p. - Published in : Phys. Lett. B 452 (1999) 28 Access to fulltext document: PDF; Fulltext: PDF; External link: hep-ph/9811284 PDF - Please contact the library if you need to access this document.
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8.
(47)
The fine-tuning problem of the electroweak symmetry breaking mechanism in minimal SUSY models / de Carlos, B. (Madrid, Inst. Estructura Materia) ; Casas, J.A. (CERN)
We calculate the region of the MSSM parameter space (i.e. $M_{1/2}$, $m_{0}$, $\mu$, \ldots) compatible with a correct electroweak breaking and a realistic top-quark mass. [...]
hep-ph/9310232; CERN-TH-7024-93; IEM-FT-78-93; CERN-TH-7024-93.- Geneva : CERN, 1993 - 5 p. - Published in : , pp. 0340-343
Access to fulltext document: PDF; Fulltext: PDF; External link: hep-ph/9310232 PDF
In : 16th Kazimierz Meeting on Elementary-particle Physics, Kazimierz, Poland, 24 - 28 May 1993, pp.340-343 - Please contact the library if you need to access this document.
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9.
(45)
The Fine-Tuning Price of Neutralino Dark Matter in Models with Non-Universal Higgs Masses / Ellis, John R. (CERN) ; King, S.F. (Southampton U.) ; Roberts, J.P. (Warsaw U.)
We study the amounts of fine-tuning of the parameters of the MSSM with non-universal soft supersymmetry-breaking contributions to the Higgs masses (the NUHM) that would be required for the relic neutralino density to lie within the range favoured by WMAP and other astrophysical and cosmological observations. Such dark matter fine-tuning is analogous to the commonly studied electroweak fine-tuning associated with satisfying the electroweak symmetry breaking conditions, which we also study for completeness. [...]
arXiv:0711.2741; CERN-PH-TH-2007-211.- 2008 - 42 p. - Published in : JHEP 04 (2008) 099 Fulltext: arXiv:0711.2741 - PDF; JHEP04(2008)099 - PDF; SISSA/IOP Open Access article: PDF; External link: Fulltext
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10. Recommendations of the Finance Committee to Council as to the Financing of the 1965 Supplementary Programme
Recommandations du Comité des Finances au Conseil au sujet du financement du programme supplémentaire pour 1965
CERN/0572
28th Session of Council ; 1964
English: PDF
French: PDF
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