Results 1 - 10
of
10,331
Table 4: Reach in m~ g via various event topologies for R-parity violating SUGRA-inspired MSSM, assuming an integrated luminosity of 0.1 fb?1 (1 fb?1), at the Tevatron collider. We use mt = 150 GeV for the background. In a), we show results for B-violating interactions, while in b) we show results for L-violating interactions.case
"... In PAGE 38: ...ecay are simulated exactly as in Sec. 6.1, with the same detector characteristics. The resulting mass reach is listed in Table4 . We see that there is almost no reach in the E/T channel, even given the Main Injector integrated luminosity of 1 fb?1.... In PAGE 39: ... In this case, four addi- tional hard, potentially isolated leptons can exist in the nal state. The reach is again listed in Table4 . We see that in the isolated multilepton channels, very large reaches in m~ g are possible.... In PAGE 39: ... We see that in a), the summed strong production of ~ g~ g + ~ g~ q + ~ q~ q is the dominant cross section over the complete range of m~ g all the way up to 2 TeV. In case b), however, we see that the chargino/neutralino pair production reactions become the dominant SUSY particle production mechanism 12Again, it should be kept in mind that the reaches in Table4 have been obtained with lt; 0.... ..."
Table 9: The parity violating to parity conserving and p to n ratios for hypernuclear decay in \nuclear matter. quot;
1996
"... In PAGE 32: ...p2dpq(jaj2 + jbj2 +3jcj2+3jdj2+3jej2+3jfj2) R kF 0 p2dpq(2jaj2 +2jbj2+6jfj2) (83) in terms of the couplings a; b; :::f de ned in Table 2. Results are shown in Table9 . We observe that inclusion of additional exchanges plays a major role in reducing the p/n ratio from its pion-only-exchange value.... In PAGE 33: ... which clearly indicates the importance of inclusion of non-pion-exchange components in predicting the p/n ratio. A second strong indication of the presence of non-pion-exchange can be seen from Table9 in that the ratio of rates for parity-violating to parity- conserving transitions is substantially enhanced by the inclusion of kaon and vector meson exchange as compared to the simple pion-exchange-only cal- culation. We can further quantify this e ect by calculating explicitly the angular distribution of the emitted proton in the p ! np transition (there can be no asymmetry for the corresponding n ! nn case due to the identity of the nal state neutrons), yielding Wp( ) 1+ P cos (87) where = R NkF 0 p2dpq p3 2 Ref (p2c + d) R NkF 0 p2dpq 1 4(jaj2 + jbj2 +3jcj2+3jdj2+3jej2+3jfj2 (88) is the asymmetry parameter.... ..."
Table 2: Low-energy constraints on R-parity violating couplings 0 ijk
"... In PAGE 7: ... Similarly as the leptoquark Yukawa couplings L;R from Table 1, these couplings are strongly constrained by existing data. The relevant bounds are summarized in Table2 . As already pointed out, since the excess of events was observed in e+p but not in e?p scattering, the process of class (6) involving the u sea is unlikely.... ..."
Table 1: Scalar (S) and vector (V ) leptoquarks, and their electric charges Q, decay modes, branching ratios into charged lepton + jet channels, and Yukawa couplings. Given are also the most stringent low-energy bounds and the couplings deduced from the 1994-96 HERA data 18. Inclusion of the 1997 data decrease the couplings by about 15%. Using the H1 data alone would roughly give the couplings shown above. Also shown are the possible assignments of squarks with R-parity violating couplings.
"... In PAGE 3: ... The above constraints follow from pair-production mainly by q q annihilation, and are therefore practically independent of the unknown Yukawa coupling . In contrast, the mass limits obtained at HERA depend on and the quantum numbers speci ed in Table1 . For = e they range from 207 to 272 GeV 13.... In PAGE 5: ... Moreover, with such strong couplings, F = 2 leptoquarks should have shown up in e?p scattering at HERA 20, where they can be produced o the valence quark component, despite of the low luminosity of the previous e?p run. Since vector leptoquarks cannot be made responsible for an excess of events at M apos; 200 to 225 GeV because of the high Tevatron mass bounds, only the two scalar doublets S1=2 and ~ S1=2 remain from the whole Table1 as a possible interpretation. However, also these solutions have di culties.... In PAGE 7: ...ERA data for Q2 gt; 20; 000 GeV2 (from Ref. 27). Expanding the super elds in (4) in terms of matter elds, one nds interaction terms which allow for resonance production of squarks at HERA 26: e+dk R ! ~ uj L (~ uj = ~ u; ~ c; ~ t); (5) e+ uj L ! ~ dk R ( ~ dk = ~ d; ~ s;~b): (6) The cross sections are determined by the coupling constants 0 1jk. Similarly as the leptoquark Yukawa couplings L;R from Table1 , these couplings are strongly constrained by existing data. The relevant bounds are summarized in Table 2.... ..."
Table 2: Lower limits on at 95% C.L. from the HERA experiments, compared to corresponding limits reported recently by CDF and by the LEP experiments, and to limits derived from measurements of parity{violating atomic transitions. The ZEUS, H1 and ALEPH results are preliminary.
Table 1: Squark production processes at HERA (e+ beam) via a R-parity violating 0 1jk coupling.
Table 1: Lower limits on supersymmetric particle masses. `GMSB apos; refers to models with gauge-mediated supersymmetry breaking, and `RPV apos; refers to models allowing R-parity violation. Lower limit
Table 1: Lower limits on supersymmetric parti- cle masses. `GMSB apos; refers to models with gauge- mediated supersymmetry breaking, and `RPV apos; refers to models allowing R-parity violation. particle Condition Lower limit (GeV/c2) Source
"... In PAGE 18: ... Despite all the e ort, no signal has been found, forcing the experimenters to derive limits. We have tried to summarize the interesting cases in Table1 . At the present time there is little room for SUSY particles lighter... ..."
Table 1: Lower limits on supersymmetric parti- cle masses. `GMSB apos; refers to models with gauge- mediated supersymmetry breaking, and `RPV apos; refers to models allowing R-parity violation. particle Condition Lower limit (GeV/c2) Source
Table 1: Lower limits on supersymmetric parti- cle masses. `GMSB apos; refers to models with gauge- mediated supersymmetry breaking, and `RPV apos; refers to models allowing R-parity violation. particle Condition Lower limit (GeV/c2) Source
"... In PAGE 23: ... Despite all the e ort, no signal has been found, forcing the experimenters to derive limits. We have tried to summarize the interesting cases in Table1 . At the present time there is little room for SUSY particles lighter than MW .... ..."
Results 1 - 10
of
10,331