Beginning with precise data on the ratio of structure functions in deep inelastic scattering (DIS) from 3He and 3H, collected on the domain 019 ≤ xB ≤ 083, where xB is the Bjorken scaling variable, we employ a robust method for extrapolating such data to arrive at a model-independent result for the xB = 1 value of the ratio of neutron and proton structure functions. Combining this with information obtained in analyses of DIS from nuclei, corrected for target-structure dependence, we arrive at a prediction for the proton valence-quark ratio: dv uv|xB→1 = 0230(57). Requiring consistency with this result presents a challenge to many descriptions of proton structure.
Valence Quark Ratio in the Proton
Binosi, Daniele;
2022-01-01
Abstract
Beginning with precise data on the ratio of structure functions in deep inelastic scattering (DIS) from 3He and 3H, collected on the domain 019 ≤ xB ≤ 083, where xB is the Bjorken scaling variable, we employ a robust method for extrapolating such data to arrive at a model-independent result for the xB = 1 value of the ratio of neutron and proton structure functions. Combining this with information obtained in analyses of DIS from nuclei, corrected for target-structure dependence, we arrive at a prediction for the proton valence-quark ratio: dv uv|xB→1 = 0230(57). Requiring consistency with this result presents a challenge to many descriptions of proton structure.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
