SHiP: a new facility with a dedicated detector to search for new long-lived neutral particles and studying tau neutrino properties

Nuclear medium effects in the deep inelastic $ν_τ/\barν_τ-^{40}Ar$ scattering at DUNE energies

“…Double dash-dotted line shows the results for the full model with a cut of W > 2.0GeV on the CM energy. as to the atmospheric neutrino experiments [4,8,9,13,14,18].…”

“…In the accelerator sector, some experiments are planning to use ν τ beams from the ν µ → ν τ oscillations as well as from the decay of D s −mesons (D s → τ ν τ ) which are produced in the high energy proton-nucleus collisions. For example, the Search for Hidden Particles (SHiP) collaboration at CERN [13,14] and the Deep Underground Neutrino Experiment (DUNE) collaboration at Fermilab [15][16][17] plan to use the ν τ beam from the ν µ → ν τ oscillations, while the DsTau collaboration [18] plans to use ν τ beam from the decays of D s mesons. Recently at CERN, the FASERν experiment has been proposed to detect collider neutrinos using emulsion detector [19].…”

“…The need for studying the nuclear medium effects in the ν τ −nucleus interactions has been emphasized earlier in some experimental and theoretical papers in the context of τ −lepton production induced by the tau neutrinos [20,23]. With the increasing interest in ν τ physics [10,[13][14][15][16][17][18][19] it is also important to understand the ν τ − interaction cross sections in the nuclear targets [24,25]. But a serious attempt to study these effects quantitatively has been lacking except for the earlier work of Paschos and Yu [20] in which the nuclear medium effects in the ν τ −nucleus scattering in the deep inelastic region has been incorporated at the leading order (LO) in the massless limit of quarks using the phenomenological nuclear structure functions of Eskola et al [26] and Hirai et al [27].…”

Nonperturbative and higher order perturbative effects in deep inelastic $ν_τ/\barν_τ-$nucleon scattering

“…Furthermore, ν τ interaction studies are also required to better determine the properties of the third neutrino weak eigenstate to have precise understanding of the neutrino oscillation parameters. Keeping this in mind new proposed experiments are coming up, for example, the SHiP (Search for Hidden Particles) [15,16] and the DsTau [17] experiments. The SHiP experiment at CERN (European Council for Nuclear Research) is planning to measure ν τ /ν τ events using proton-proton collisions giving rise to D s -mesons which subsequently decay to τ ν τ and the plan is to study ν τ /ν τ scattering on lead target with a few hundred times larger statistics than observed in the DONuT experiment.…”

“…The uncertainties in the cross sections arising due to the use of different approaches for NLO evolution of parton densities such as given by Kretzer et al [23], and Vermaseren et al [34] and Moch et al [35,36] have been discussed. The results of the cross sections are compared with the earlier results available in the literature like that of Kretzer et al [23,24], Jeong et al [25], Anelli et al [37], Paschos et al [27], Hagiwara et al [26] and Gazizov et al [28] some of which have been used in the experimental analysis to obtain ν τ −nucleon cross sections by the DONuT [5,6], SuperK [12,13] and IceCube [14] collaborations as well as in the simulation studies made for the proposed experiments by SHiP [15,16], DsTau [17] and DUNE [18][19][20] collaborations.…”