Search for narrow diphoton resonances and forγγ+W/Zsignatures inpp¯collisions at<

Abstract

We present results of searches for diphoton resonances produced both inclusively and also in association with a vector boson (W or Z) using 100 pb −1 of pp collisions using the CDF detector. We set upper limits on the product of cross section times branching ratio for both pp → γγ +X and pp → γγ +W/Z. Comparing the inclusive production to the expectations from heavy sgoldstinos we derive limits on the supersymmetry-breaking scale √ F in the TeV range, depending on the sgoldstino mass and the choice of other parameters. Also, using a NLO prediction for the associated production of a Higgs boson with a W or Z boson, we set an upper limit on the branching ratio for H → γγ. Finally, we set a lower limit on the mass of a 'bosophilic' Higgs boson (e.g. one which couples only to γ, W , and Z bosons with standard model couplings) of 82 GeV/c 2 at 95% confidence level. PACS number(s): 13.85

Diphoton and diboson probes of fermiophobic Higgs bosons at the LHC

“…In a number of models, neutral Higgs bosons with suppressed or vanishing couplings to SM fermions are present at the weak scale after EWSB. These 'fermiophobic' Higgs bosons have many generic phenomenological features which have been considered for some time [3][4][5][6][7][8][9][10][11][12][13][14][15] and searched for previously at LEP [16][17][18][19], Tevatron [20,21], and LHC [22]. They can be found in 'Type I' two Higgs doublet models [23] in the large tan β limit [15,24,25] as well as Higgs triplet models [26][27][28][29][30][31][32][33] including the well known Georgi-Macachek (GM) model [34] and its variations [35,36,36,37,[37][38][39][40][41][42] or their supersymmetric incarnations [43][44][45]…”

Search for a Higgs Boson in the Diphoton Final State inpp¯Collisions ats=1.96 TeV

“…The Collider Detector at Fermilab (CDF) and D0 experiments at the Tevatron have searched for both a SM Higgs boson and a fermiophobic Higgs boson h f decaying to two photons [6][7][8]. The D0 experiment recently set 95% confidence level (C.L.)…”