SUSY Higgs Searches at the LHC

Searches for the Higgs bosons of the Minimal Supersymmetric Standard Model are discussed at the LHC in the CMS and ATLAS experiments. Results are presented for the scenario which maximizes the mass of the lighter scalar Higgs boson. Low integrated luminosity is assumed

Traženje teškog Higgsovog bozona u kanalu H → ZZ → 4l ± pomoću CMS detektora

We investigate possibilities of search for the Standard Model Higgs boson in the H → ZZ → 4l ± channel in the upper mass reach in the Compact Muon Solenoid detector (CMS). By using appropriate cuts on the data, it was found that CMS can detect Higgs boson up to the mass of about 750 GeV at ≥ 5σ significance level with the designed integrated luminosity of 105 pb−1 . The mass reach extends to about 850 GeV at 3 · 105 pb−1 .Ispitujemo mogućnosti za traženje Higgsovog bozona prema Standardnom modelu u kanalu H → ZZ → 4l ± u području osjetljivosti za velike mase Kompaktnog mionskog solenoidnog (CMS) detektora. Primjenom pogodnih rezova našli smo da se pomoću CMS detektorskog sustava mogu opaziti Higgsovi bozoni do mase oko 750 GeV na razini pouzdanosti ≥ 5σ, uz pretpostavku integralnog luminoziteta od 105 pb−1 . Za 3 · 105 pb−1 mogli bi se opaziti bozoni do mase 850 GeV

Proučavanje H → ZZ → 4ℓ ± pomoću cjelovite geant simulacije detektora CMS

We study the detection of H → ZZ → 4ℓ ± in the CMS detector at the nominal LHC energy √ s = 14 TeV and the possibility for an early detection at a reduced energy √ s = 10 TeV. A systematic study of the multi–lepton mass resolution is performed, including effects of internal and external radiation through detailed GEANT simulations. At √ s = 14 TeV, an integrated luminosity of 104 pb−1 allows exploration at a ≥ 5σ significance level a mass range from mH ≈ 2mZ up to mH ≈ 400 GeV. For 105 pb−1 , the mass reach is about 650 GeV. At √ s = 10 TeV, an integrated luminosity of 104 pb−1 does not provide a 5σ significance level for any value of Higgs mass, and 2 × 104 pb−1 alows one to explore a mass range from mH ≈ 2mZ to ≈ 350 GeV at ≥ 5σ level.Proučava se detekcija H → ZZ → 4ℓ ± procesa u detektoru CMS na nominalnoj energiji LHC √ s = 14 TeV i mogućnost ranijeg opažanja na manjoj energiji od 10 TeV. Studija uključuje instrumentalne efekte za elektrone i muone i njihov utjecaj na razlučivanje višeleptonskih masa

Does Fertility Respond to Financial Incentives?

There has been little empirical work evaluating the sensitivity of fertility to financial incentives at the household level. We put forward an identification strategy that relies on the fact that variation of wages induces variation in benefits and tax credits among "comparable" households. We implement this approach by estimating a discrete choice model of female participation and fertility, using individual data from the French Labor Force Survey and a fairly detailed representation of the French tax-benefit system. Our results suggest that financial incentives play a notable role in determining fertility decisions in France, both for the first and for the third child. As an example, an unconditional child benefit with a direct cost of 0.3% of GDP might raise total fertility by about 0.3 point

Search for Higgs Bosons in SUSY Cascades in CMS and Dark Matter with Non-universal Gaugino Masses

In grand unified theories (GUT), non-universal boundary conditions for the gaugino masses may arise at the unification scale, and affect the observability of the neutral MSSM Higgs bosons (h/H/A) at the LHC. The implications of such non-universal gaugino masses are investigated for the Higgs boson production in the SUSY cascade decay chain gluino --> squark quark, squark --> neutralino_2 quark, neutralino_2 --> neutralino_1 h/H/A, h/H/A --> b b-bar produced in pp interactions. In the singlet representation with universal gaugino masses only the light Higgs boson can be produced in this cascade with the parameter region of interest for us, while with non-universal gaugino masses heavy neutral MSSM Higgs boson production may dominate. The allowed parameter space in the light of the WMAP constraints on the cold dark matter relic density is investigated in the above scenarios for gaugino mass parameters. We also demonstrate that combination of representations can give the required amount of dark matter in any point of the parameter space. In the non-universal case we show that heavy Higgs bosons can be detected in the studied cascade in parameter regions with the WMAP preferred neutralino relic density.Comment: LaTeX (svjour,rotating,multirow,url,subfig,psfrag), 18 pages, 36 eps figure

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Lähiöravintola Pekka Sulkunen, PerttiAlasuutari, RitvaNätkin,Merja Kinnune

CMS The Computing Project : Technical Design Report

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