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/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

We present a method of analyzing invariant-mass spectra of kaon pairsresulting from decay of $\phi$ mesons produced in high-energy heavy-ioncollisions. It can be used to extract the shifts in the mass and the width($\Delta M$ and $\Delta \Gamma$) of the $\phi$ mesons when they are inside thedense matter formed in these collisions. We illustrate our method with the helpof available preliminary data. Extracted values of $\Delta M$ and $\Delta\Gamma$ are significantly larger than those obtained with an earlier method.Our results are consistent with the experimentally observed $p_T$ dependence ofthe mass shift. Finally, we present a phenomenological relation between $\DeltaM$ and $\Delta \Gamma$. It provides a useful constraint on theories whichpredict the values of these two quantities.Comment: 11 pages, latex, revtex; 3 Postscript figures; to appear in Modern  Phys. Lett. (A

Apparent and Actual Shifts in Mass and Width of ϕ Mesons Produced in Heavy-Ion Collisions