PPT Slide
- Volume correction is adhoc, but may be needed especially when we estimate the absolute particle density. However there seems to be possible debate on the volume parameter ( PRC 56, 2210, 1997 , ~0.8fm ).
- Change of the volume parameter ruins the predictability of the model. The radius parameters of the particles has 0.3 fm as the the default value as chosen in Phys. Lett. B465, 15-20, 1999.
- Physicswise volume correction can change the relative abundance of particles.
(volume has to be chosen appropriately to simulate the repulsive interactions between hadrons)
- As we turn down the volume correcrtion, the absolute density increases by almost constant factor close to 50% w.r.t the default choice. When we change only the pion volume factor, pion multiplicity almost exclusively increase. Small discrepancy with the red points is due to the volume effect of the other particles.