Author: Argus Corporation
Publisher:
ISBN:
Category :
Languages : en
Pages : 7
Book Description
Search for Narrow States Coupling to [tau] Pairs in Radiative [upsilon] Decays
Author: Argus Corporation
Publisher:
ISBN:
Category :
Languages : en
Pages : 7
Book Description
Publisher:
ISBN:
Category :
Languages : en
Pages : 7
Book Description
Search for narrow states coupling to τ pairs in radiative τ decays
Author:
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ISBN:
Category :
Languages : de
Pages :
Book Description
Publisher:
ISBN:
Category :
Languages : de
Pages :
Book Description
Search for narrow states coupling to _t63 pairs in radiative _t63 decays
Author:
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ISBN:
Category :
Languages : de
Pages :
Book Description
Publisher:
ISBN:
Category :
Languages : de
Pages :
Book Description
Energy Research Abstracts
Author:
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ISBN:
Category : Power resources
Languages : en
Pages : 664
Book Description
Publisher:
ISBN:
Category : Power resources
Languages : en
Pages : 664
Book Description
A Search for Narrow States in Radiative Upsilon Decays
Author: Stephen T. Lowe
Publisher:
ISBN:
Category : Mesons
Languages : en
Pages : 266
Book Description
Publisher:
ISBN:
Category : Mesons
Languages : en
Pages : 266
Book Description
ERDA Energy Research Abstracts
Author:
Publisher:
ISBN:
Category : Power resources
Languages : en
Pages : 676
Book Description
Publisher:
ISBN:
Category : Power resources
Languages : en
Pages : 676
Book Description
Search for Narrow States Coupling to Τ Pairs in Radiative Υ Decays
Author:
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ISBN:
Category :
Languages : en
Pages :
Book Description
Publisher:
ISBN:
Category :
Languages : en
Pages :
Book Description
INIS Atomindeks
Author:
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ISBN:
Category : Nuclear energy
Languages : en
Pages : 1206
Book Description
Publisher:
ISBN:
Category : Nuclear energy
Languages : en
Pages : 1206
Book Description
High Energy Physics Index
Author:
Publisher:
ISBN:
Category : Particles (Nuclear physics)
Languages : en
Pages : 762
Book Description
Publisher:
ISBN:
Category : Particles (Nuclear physics)
Languages : en
Pages : 762
Book Description
A Search for Narrow States in Radiative Upsilon Decays
Author:
Publisher:
ISBN:
Category :
Languages : en
Pages :
Book Description
A search for new states produced in radiative UPSILON(1S) decays is accomplished by observing the inclusive photon energy spectrum. A narrow resonance in the energy spectrum indicates the existence of a new state X produced by the process UPSILON .-->. .gamma. X. The analysis is based on approximately 0.44 x 106 UPSILON(1S) events produced at the DORIS II ee− storage ring. These data were collected with the Crystal Ball detector between April 1983 and May 1986. This analysis finds no evidence for a new state, so upper limits on the branching ratio BR(UPSILON .-->. .gamma. X) are derived, assuming the state X decays primarily to high-multiplicity hadronic final states. In particular, if the state X were a minimal Higgs particle, its primary decay mode would be to the heaviest fermion-antifermion pair energetically available. For the radiative UPSILON(1S) decays studied here, the heavy fermions would be c anti c or s anti s quark states, over most of the relevant Higgs' mass range. The resulting upper limit for BR(UPSILON(1S) .-->. .gamma. X) is highly energy dependent but for X mass between 1.5 GeV and 8.0 GeV, the 90% confidence level upper limit is better than 8.0 x 10−4. For a Higgs' mass near 5.0 GeV, the upper limit is about 2.0 x 10−4 which is approximately equal to the lowest order calculation for the Wilczek mechanism. The Wilczek calculation with QCD radiative corrections predict branching ratios below the limits set here for all Higgs' masses.
Publisher:
ISBN:
Category :
Languages : en
Pages :
Book Description
A search for new states produced in radiative UPSILON(1S) decays is accomplished by observing the inclusive photon energy spectrum. A narrow resonance in the energy spectrum indicates the existence of a new state X produced by the process UPSILON .-->. .gamma. X. The analysis is based on approximately 0.44 x 106 UPSILON(1S) events produced at the DORIS II ee− storage ring. These data were collected with the Crystal Ball detector between April 1983 and May 1986. This analysis finds no evidence for a new state, so upper limits on the branching ratio BR(UPSILON .-->. .gamma. X) are derived, assuming the state X decays primarily to high-multiplicity hadronic final states. In particular, if the state X were a minimal Higgs particle, its primary decay mode would be to the heaviest fermion-antifermion pair energetically available. For the radiative UPSILON(1S) decays studied here, the heavy fermions would be c anti c or s anti s quark states, over most of the relevant Higgs' mass range. The resulting upper limit for BR(UPSILON(1S) .-->. .gamma. X) is highly energy dependent but for X mass between 1.5 GeV and 8.0 GeV, the 90% confidence level upper limit is better than 8.0 x 10−4. For a Higgs' mass near 5.0 GeV, the upper limit is about 2.0 x 10−4 which is approximately equal to the lowest order calculation for the Wilczek mechanism. The Wilczek calculation with QCD radiative corrections predict branching ratios below the limits set here for all Higgs' masses.