Extending sensitivity for low-mass neutral heavy lepton searches
نویسندگان
چکیده
منابع مشابه
Searches for Lepton
B. Aubert, Y. Karyotakis, J. P. Lees, V. Poireau, E. Prencipe, X. Prudent, V. Tisserand, J. Garra Tico, E. Grauges, M. Martinelli, A. Palano, M. Pappagallo, G. Eigen, B. Stugu, L. Sun, M. Battaglia, D.N. Brown, B. Hooberman, L. T. Kerth, Yu. G. Kolomensky, G. Lynch, I. L. Osipenkov, K. Tackmann, T. Tanabe, C.M. Hawkes, N. Soni, A. T. Watson, H. Koch, T. Schroeder, D. J. Asgeirsson, C. Hearty, T...
متن کاملSearches for Quark and Lepton
If quarks and leptons are made of constituents, then at the scale of constituent binding energies, there should appear new interactions among quarks and leptons. At energies much below the compositeness scale (Λ), these interactions are suppressed by inverse powers of Λ. The dominant effect should come from the lowest dimensional interactions with four fermions (contact terms), whose most gener...
متن کاملSearches for Flavour Changing Neutral Currents and Lepton Flavour Violation at HERA
A summary of the recent searches for anomalous single top-quark production and lepton flavour violation in high energy e±p collisions is presented. Single top-quark production via an anomalous flavour changing neutral current γ−u− t coupling would lead to the reaction ep → etX , t → Wb. H1 observed an excess of events above the Standard Model prediction in the leptonic decay channel of the W bo...
متن کامل– 1 – Searches for Quark and Lepton Compositeness
If quarks and leptons are made of constituents, then at the scale of constituent binding energies, there should appear new interactions among quarks and leptons. At energies much below the compositeness scale (Λ), these interactions are suppressed by inverse powers of Λ. The dominant effect should come from the lowest dimensional interactions with four fermions (contact terms), whose most gener...
متن کاملSearches for Prompt Heavy Quarkonia
We have searched for prompt heavy quarkonia and Bc mesons in 3 × 106 hadronic Z0 decays recorded with the DELPHI detector at LEP. No signal was observed in any of these modes. We achieved the highest sensitivities for gluon fragmentation into J/ψ and for semileptonic B c decays, yielding branching ratio upper limits of B(Z 0 → J/ψggX) < 4.1×10−4 and B(Z0 → B c X)·B(B ± c → J/ψl νl) < 5.0×10 −5 ...
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ژورنال
عنوان ژورنال: Physical Review D
سال: 1997
ISSN: 0556-2821,1089-4918
DOI: 10.1103/physrevd.56.2970