Search for BSM physics at TeV scale by exploring the transverse polarization of electrons emitted in neutron decay – the BRAND project

Orateur : Kazimierz BODEK (University in Krakow, 30-348 Krakow, Poland)

Neutron and nuclear beta decay correlation coefficients are linearly sensitive to the exotic scalar and tensor interactions that are not included in the Standard Model (SM). The proposed experiment will measure simultaneously 11 neutron correlation coefficients (a, A, B, D, H, L, N, R, S, U, V ) where 7 of them (H, L, N, R, S, U, V ) depend on the transverse electron polarization – a quantity which vanishes in the SM. The neutron decay correlation coefficients H, L, S, U, V were never attempted experimentally before. The expected impact of the proposed experiment is comparable to that of the spectrum shape measurements but offers completely different systematics and additional sensitivity to imaginary parts of the scalar and tensor couplings. In the talk, feasibility and challenges of the proposed techniques as well as timeline and milestones of the project will be discussed.

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