<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mrow><mml:msup><mml:mi>K</mml:mi><mml:mo>*</mml:mo></mml:msup><mml:msup><mml:mrow><mml:mo>(</mml:mo><mml:mn>892</mml:mn><mml:mo>)</mml:mo></mml:mrow><mml:mn>0</mml:mn></mml:msup></mml:mrow></mml:math> and <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mrow><mml:mi>ϕ</mml:mi><mml:mo>(</mml:mo><mml:mn>1020</mml:mn><mml:mo>)</mml:mo></mml:mrow></mml:math> meson production at high transverse momentum in <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mrow><mml:mi>p</mml:mi><mml:mi>p</mml:mi></mml:mrow></mml:math> and Pb-Pb collisions at <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mrow><mml:msqrt><mml:msub><mml:mi>s</mml:mi><mml:mi mathvariant="italic">NN</mml:mi></mml:msub></mml:msqrt><mml:mo>=</mml:mo><mml:mn>2.76</mml:mn></mml:mrow></mml:math> TeV

The production of ${K}^{*}{(892)}^{0}$ and $\ensuremath{\phi}(1020)$ mesons in proton-proton ($pp$) and lead-lead (Pb-Pb) collisions at $\sqrt{{s}_{\mathit{NN}}}=2.76\phantom{\rule{4pt}{0ex}}\mathrm{TeV}$ has been analyzed using a high luminosity data sample accumulated in 2011 with the ALICE detector at the Large Hadron Collider (LHC). Transverse momentum (${p}_{\mathrm{T}}$) spectra have been measured for ${K}^{*}{(892)}^{0}$ and $\ensuremath{\phi}(1020)$ mesons via their hadronic decay channels for ${p}_{\mathrm{T}}$ up to $20\phantom{\rule{4pt}{0ex}}\mathrm{GeV}/c$. The measurements in $pp$ collisions have been compared to model calculations and used to determine the nuclear modification factor and particle ratios. The ${K}^{*}{(892)}^{0}/K$ ratio exhibits significant reduction from $pp$ to central Pb-Pb collisions, consistent with the suppression of the ${K}^{*}{(892)}^{0}$ yield at low ${p}_{\mathrm{T}}$ due to rescattering of its decay products in the hadronic phase. In central Pb-Pb collisions the ${p}_{\mathrm{T}}$ dependent $\ensuremath{\phi}(1020)/\ensuremath{\pi}$ and ${K}^{*}{(892)}^{0}/\ensuremath{\pi}$ ratios show an enhancement over $pp$ collisions for ${p}_{\mathrm{T}}\ensuremath{\approx}3\phantom{\rule{4pt}{0ex}}\mathrm{GeV}/c$, consistent with previous observations of strong radial flow. At high ${p}_{\mathrm{T}}$, particle ratios in Pb-Pb collisions are similar to those measured in $pp$ collisions. In central Pb-Pb collisions, the production of ${K}^{*}{(892)}^{0}$ and $\ensuremath{\phi}(1020)$ mesons is suppressed for ${p}_{\mathrm{T}}&gt;8\phantom{\rule{4pt}{0ex}}\mathrm{GeV}/c$. This suppression is similar to that of charged pions, kaons, and protons, indicating that the suppression does not depend on particle mass or flavor in the light quark sector.

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