The transverse-momentum ($p_{ \rm T}$) spectra of ${ \rm K}^*(892)^0$ and $\phi(1020)$ measured with the ALICE detector up to $p_{ \rm T}$ = 16 GeV/$c$ in the rapidity range $-1.2 < y < 0.3$, in p-Pb collisions at the center-of-mass energy per nucleon-nucleon collision $\sqrt{ s_{ \rm NN}}$ = 5.02 TeV are presented as a function of charged particle multiplicity and rapidity. The measured $p_{ \rm T}$ distributions show a dependence on both multiplicity and rapidity at low $p_{ \rm T}$ whereas no significant dependence is observed at high $p_{ \rm T}$. A rapidity dependence is observed in the $p_{ \rm T}$-integrated yield (d$N$/d$y$), whereas the mean transverse momentum ($\left< p_{ \rm T} \right>$) shows a flat behavior as a function of rapidity. The rapidity asymmetry ($Y_{ \rm asym}$) at low $p_{ \rm T}$ ( < 5 GeV/$c$) is more significant for higher multiplicity classes. At high $p_{ \rm T}$, no significant rapidity asymmetry is observed in any of the multiplicity classes. Both ${ \rm K}^*(892)^0$ and $\phi(1020)$ show similar $Y_{ \rm asym}$. The nuclear modification factor ($Q_{ \rm CP}$) as a function of $p_{ \rm T}$ shows a Cronin-like enhancement at intermediate $p_{ \rm T}$, which is more prominent at higher rapidities (Pb-going direction) and in higher multiplicity classes. At high $p_{ \rm T}$ (> 5 GeV/$c$), the $Q_{ \rm CP}$ values are greater than unity and no significant rapidity dependence is observed.
Categories: nucl-ex hep-ex