We report a search for narrow resonances, produced in $p\bar{p}$ collisions at $\sqrt{s}=1.96$ TeV, that decay into muon pairs with invariant mass between 6.3 and 9.0 GeV/c super(2). The data, ...collected with the CDF II detector at the Fermilab Tevatron collider, correspond to an integrated luminosity of 630 pb super(-1). We use the dimuon invariant mass distribution to set 90% upper credible limits of about 1% to the ratio of the production cross section times muonic branching fraction of possible narrow resonances to that of the (1S) meson.
A search for t→τνq in tt¯ production Abulencia, A.; Ambrose, D.; Anikeev, K. ...
Physics letters. B,
08/2006, Volume:
639, Issue:
3-4
Journal Article
Peer reviewed
We present a search for tt¯ events with a tau lepton in the final state. The data sample corresponds to an integrated luminosity of 194 pb−1 collected with the CDF II detector from pp¯ collisions at ...a center of mass energy of 1.96 TeV. We observe two events with an expected signal of 1.0±0.2 events and a background of 1.3±0.3 events. We determine a 95% confidence level upper limit on rτ, the ratio of the measured rate of t→τνq to the expectation, of 5.2.
Phys. Rev. Lett. 129 (2022) 1, 011804 We report a search for nonstandard neutrino interactions (NSI) using eight
years of TeV-scale atmospheric muon neutrino data from the IceCube Neutrino
...Observatory. By reconstructing incident energies and zenith angles for
atmospheric neutrino events, this analysis presents unified confidence
intervals for the NSI parameter $\epsilon_{\mu \tau}$. The best-fit value is
consistent with no NSI at a p-value of 25.2%. With a 90% confidence interval of
$-0.0041 \leq \epsilon_{\mu \tau} \leq 0.0031$ along the real axis and similar
strength in the complex plane, this result is the strongest constraint on any
NSI parameter from any oscillation channel to date.
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