2002
DOI: 10.1016/s0370-2693(02)02380-8
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Search for charged Higgs bosons in e+e− collisions at energies up to  GeV

Abstract: A search for charged Higgs bosons produced in pairs is performed with data collected at centre-of-mass energies ranging from 189 to 209 GeV by ALEPH at LEP, corresponding to a total luminosity of 629 pb −1 . The three final states τ + ν τ τ −ν τ , csτ −ν τ and cssc are considered. No evidence for a signal is found and lower limits are set on the mass m H ± as a function of the branching fraction B(H + → τ + ν τ ). In the framework of a two-Higgs-doublet model, and assuming B(H + → τ + ν τ )+B(H + → cs)=1, char… Show more

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Cited by 78 publications
(74 citation statements)
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“…Given the experimental lower bounds on m W and m S [48,49], the error on F W is irrelevant while |F S | gets enhanced by about 10% for m S = 150 GeV: since the experimental error on µ γγ is large and constructive interference of the S ± and W ± is favored by the experiment, we also assume the error involved by the above approximation for F S to be negligible. We notice also that in the limit of heavy masses for the charged scalar and vector bosons the light Higgs decay to such (virtual) states is highly suppressed by kinematics, and therefore no additional decay channels have to be taken into account besides those of the SM.…”
Section: Jhep01(2014)041mentioning
confidence: 99%
See 1 more Smart Citation
“…Given the experimental lower bounds on m W and m S [48,49], the error on F W is irrelevant while |F S | gets enhanced by about 10% for m S = 150 GeV: since the experimental error on µ γγ is large and constructive interference of the S ± and W ± is favored by the experiment, we also assume the error involved by the above approximation for F S to be negligible. We notice also that in the limit of heavy masses for the charged scalar and vector bosons the light Higgs decay to such (virtual) states is highly suppressed by kinematics, and therefore no additional decay channels have to be taken into account besides those of the SM.…”
Section: Jhep01(2014)041mentioning
confidence: 99%
“…First, we scan the parameter space looking for data points that produce the right SM mass spectrum and satisfy the direct searches for charged particles at LEP [49] and a heavy neutral scalar at LHC [67] as well as the EW precision constraints from the S and T parameters [52][53][54]. More specifically, we impose the constraints…”
Section: Jhep01(2014)041 3 Model and Constraintsmentioning
confidence: 99%
“…Searches at LEP have set a limit M H ± > 79. 3 GeV on the mass of a charged Higgs boson in a general two-Higgs-doublet model [2]. Within the MSSM, the charged-Higgs mass is constrained by the pseudoscalar Higgs mass and the W-boson mass through M 2 H ± = M 2 A + M 2 W at tree level, with only moderate higher-order corrections [3][4][5][6].…”
Section: Introductionmentioning
confidence: 99%
“…Since the coupling H ±f i f j is sizably suppressed by s + , the search experiments through the top quark decay hardly give the constraints on H ± . The experimental data at the LEP gives the lower bound of the charged Higgs mass, m H ± > 79.3 GeV [69,70].…”
Section: Jhep03(2014)010mentioning
confidence: 99%