English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Zendy Plus

Presents the zaia usage as premium feature

ZAIA

Presents the pdf analysis as premium feature

PDF Analysis

Insights

Presents the summarisation as premium feature

Summarisation

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the access of premium content as premium feature

Premium Content

Zendy Tools

Zendy Open

We report on a search for a bound di-neutron by comparing electron-inducedproton-knockout $(e,e'p)$ measurements from Helium-3 ($^3$He) and Tritium($^3$H). The measurements were performed at Jefferson Lab Hall A with a 4.326GeV electron beam, and kinematics of large momentum transfer $Q^2 \approx 1.9$(GeV/$c$)$^2$ and $x_B>1$, to minimize contributions from non quasi-elastic(QE) reaction mechanisms. Analyzing the measured $^3$He missing mass($M_{miss}$) and missing energy ($E_{miss}$) distributions, we can distinguishthe two-body break-up reaction, in which the residual proton-neutron systemremains bound as a deuteron. In the $^3$H mirror case, under the exact samekinematic conditions, we do not identify a signature for a bound di-neutronwith similar binding energy to that of the deuteron. We calculate exclusionlimits as a function of the di-neutron binding energy and find that, forbinding equivalent to the deuteron, the two-body break-up cross section on$^3$H is less than 0.9% of that on $^3$He in the measured kinematics at the 95%confidence level.

Search for a bound di-neutron by comparing $^3$He(e,e'p)d and $^3$H(e,e'p)X measurements