Speaker
Description
A first measurement of the 1-jettiness event shape observable in neutral-current deep-inelastic electron-proton scattering is presented. The 1-jettiness observable $\tau^1_b$ is defined such that it is equivalent to the thrust observable in the Breit frame, following momentum conservation. The data were taken with the H1 detector at the HERA $ep$ collider at a center-of-mass energy of 319 GeV in the years 2003 to 2007 and correspond to an integrated luminosity of about 351pb$^{-1}$. The triple-differential cross sections are presented as a function of the 1-jettiness $\tau^1_b$, the event virtuality $Q^2$ and the Bjorken-variable $x_\text{Bj}$ in the kinematic region $Q^2>150$\,GeV$^2$. The data have high sensitivity to the parton distribution functions of the proton, the strong coupling constant and to resummation and hadronisation effects. The data are compared to selected predictions.
| First author | Stefan Schmitt |
|---|---|
| sschmitt@mail.desy.de | |
| Collaboration / Activity | H1 collaboration |
