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Register a new userRecent Results from the BNL E787 Experiment
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T. K. Komatsubara
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Recent results from a rare kaon decay experiment E787 at the BNL-AGS on K^+ to pi^+ u bar u, K^+ to mu^+ u gamma, and K^+ to pi^+ pi^0 gamma decays are reported.
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MINOS is an accelerator neutrino oscillation experiment at Fermilab. An intense high energy neutrino beam is produced at Fermilab and sent to a near detector on the Fermilab site and also to a 5 kTon far detector 735 km away in the Soudan mine in northern Minnesota. The experiment has now had several years of running with millions of events in the near detector and hundreds of events recorded in the far detector. I will report on the recent results from this experiment which include precise measurement of $|Delta m^2_{32}|$, ~analysis of neutral current data to limit the component of sterile neutrinos, and the search for $ u_mu to u_e$ conversion. The focus will be on the analysis of data for $ u_mu to u_e$ conversion. Using data from an exposure of $3.14times 10^{20}$ protons on target, we have selected electron type events in both the near and the far detector. The near detector is used to measure the background which is extrapolated to the far detector. We have found 35 events in the signal region with a background expectation of $27pm 5(stat)pm 2(syst)$. Using this observation we set a 90% C.L. limit of $sin^2 2 theta_{13} < 0.29$ for $delta_{cp} = 0$ and normal mass hierarchy. Further analysis is under way to reduce backgrounds and improve sensitivity.
We report the recent results of a search for the decay B- --> tau- anti-nu_tau, observations of new resonances X, Y and Z, and the first results from Upsilon(5S) data collected with the Belle detector at KEKB e+e- collider.
A summary of recent results from ZEUS is presented. New ZEUS results from HERA-1 data include Structure Functions, QCD fits, analysis of hadronic final states, precision measurements of alpha_s, production of heavy flavor mesons and baryons and studies of diffraction. Results from the new HERA-II running include the measurement of the cross section for polarized charged current events and charm events tagged with the new ZEUS vertex detector.
This manuscript is a short summary of my talk given at ICNFP2014 Conference. Here we report on new results of $sin^22theta_{13}$ and $Delta m^2_text{ee}$ measurements, search for the sterile neutrino within $10^{-3} text{ eV}^2 <Delta m^2_{41}<0.1text{ eV}^2$ domain and precise measurement of the reactor absolute antineutrino flux.
Single Spin Asymmetry $A_N$ (SSA) was measured at the Protvino 70 GeV accelerator. Asymmetry in the reaction $ppdup$ is close to zero within error bars at small $|xf|$ and $p_T<1.5$ GeV/c. SSA in the reaction $pimp$ at polarized target fragmentation region equals to $(-13.8 pm 3.8)%$ at $|x_f|>0.4$. There is an indication that the asymmetry begins to rise up at the same centre of mass system pion energy.
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