https://doi.org/10.1140/epjc/s10052-020-08654-9
Regular Article - Theoretical Physics
String fragmentation with a time-dependent tension
School of Physics and Astronomy, Monash University, Wellington Road, Clayton, VIC, 3800, Australia
* e-mail: peter.skands@monash.edu
Received:
9
August
2020
Accepted:
7
November
2020
Published online:
20
November
2020
Motivated by recent theoretical arguments that expanding strings can be regarded as having a temperature that is inversely proportional to the proper time, $$\tau $$, we investigate the consequences of adding a term $$\propto 1/\tau $$ to the string tension in the Lund string-hadronization model. The lattice value for the tension, $$\kappa _0 \sim 0.18\,{\mathrm {GeV}}^2\sim 0.9\,{\mathrm {GeV}}/{\mathrm {fm}}$$, is then interpreted as the late-time/equilibrium limit. A generic prediction of this type of model is that early string breaks should be associated with higher strangeness (and baryon) fractions and higher fragmentation $$\langle p_\perp \rangle $$ values. It should be possible to use archival ee data sets to provide model-independent constraints on this type of scenario, and we propose a few simple key measurements to do so.
© The Author(s), 2020
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