View source for Available energy (particle collision)

{{for|the concept in classical thermodynamics|Exergy}}
In [[particle physics]], the '''available energy''' is the energy in a particle collision available to produce new particles from the [[energy]] of the colliding particles.<ref>{{Cite journal |last1=Dao |first1=F. T. |last2=Whitmore |first2=J. |date=1973-09-17 |title=Study of neutral-charged particle correlations in high energy collisions |url=https://dx.doi.org/10.1016/0370-2693%2873%2990697-7 |journal=Physics Letters B |language=en |volume=46 |issue=2 |pages=252–256 |doi=10.1016/0370-2693(73)90697-7 |issn=0370-2693|url-access=subscription }}</ref><ref>{{Cite journal |last1=Mishra |first1=Aditya Nath |last2=Sahoo |first2=Raghunath |last3=Sarkisyan |first3=Edward K. G. |last4=Sakharov |first4=Alexander S. |date=2014-11-18 |title=Effective-energy budget in multiparticle production in nuclear collisions |journal=The European Physical Journal C |language=en |volume=74 |issue=11 |pages=3147 |doi=10.1140/epjc/s10052-014-3147-1 |issn=1434-6052|doi-access=free |arxiv=1405.2819 }}</ref>

In early accelerators both colliding particles usually survived after the collision, so the available energy was the total [[kinetic energy]] of the colliding particles in the [[center-of-momentum frame]] before the collision. In modern accelerators particles collide with their anti-particles and can annihilate, so the available energy includes both the kinetic energy and the [[rest energy]] of the colliding particles in the center-of-momentum frame before the collision.<ref name="UniversityPhysics"> University Physics with Modern Physics, 15th Edition, ISBN 978-0-135-15955-2 by Hugh D. Young and Roger A. Freedman, published by Pearson Education © 2020. P.1518</ref>

== See also ==
*[[Threshold energy]]
*[[Matter creation]]

== References ==
{{Reflist}}
[[Category:Particle physics]]



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