Experimental study of opposite-sign dimuons produced in neutrino and antineutrino interactions

Flavor structure of the nucleon sea

“…2.2. The measurements of charm production with dimuon events in the final state have been performed by several experiments: CDHS [62], CCFR [63,64], CHARMII [65], NOMAD [66,67], NuTeV [68,69,70,71] and CHO-RUS [72,73]. The integrated strange over non-strange nucleon sea κ s , defined as…”

Next-to-Leading order QCD corrections to charged current charm production and the unpolarized and polarized strange sea at HERA

“…with the normalization constant N being related to ε c via 1 0 dzD c (z) = 1. The 'hardness' parameter will be fixed to be ε c = 0.06 for our numerical applications in the next section in agreement [18,20] with fixed target neutrino data [4][5][6]. For our phenomenological considerations in the following section the precise value of ε c is, however, of minor importance.…”

“…In recent sets of unpolarized parton distributions it is either assumed thats (= s) has the same x shape asū+d [1,2], ors is solely generated by QCD dynamics from a vanishing input distribution at some low scale [3], in both cases leading to an overall suppression of the x integrated second moment dx xs in the light sea of about 50% at Q 2 ≃ 5−10 GeV 2 [4][5][6][7], presumably due to the larger mass of strange quarks. The entire x dependence of the flavor decomposed unpolarized light sea is, however, still rather uncertain.…”

Antineutrino Oscillations in the Atmospheric Sector

“…Such transitions could be introduced by the V+A currents that arise in left-right symmetric models [108], but stringent limits have been set on leptonic V+A interactions by studies of the end point spectrum in polarized µ + decay [109], by studies of inverse muon decay [110], and by studies of the high-y dependence of ν µ /ν µ -nuclei interactions [111,112]. Scalar (S) and pseudoscalar (P)…”