Smooth interpolation between thermal Born and LPM rates
In: https://hal.archives-ouvertes.fr/hal-03394583 ; 2021, 2021
report
Zugriff:
In a weakly coupled ultrarelativistic plasma, $1 + n \leftrightarrow 2 + n$ scatterings, with $n \ge 0$, need sometimes to be summed to all orders, in order to determine a leading-order interaction rate. To implement this "LPM resummation", kinematic approximations are invoked. However, in cosmological settings, where the temperature changes by many orders of magnitude and both small and large momenta may play a role, such approximations are not always justified. We suggest a procedure to smoothly interpolate between LPM-resummed $1 + n \leftrightarrow 2 + n$ and Born-level $1 \leftrightarrow 2$ results, rendering the outcome applicable to a broader range of masses and momenta. The procedure is illustrated for right-handed neutrino production from a Standard Model plasma, and dilepton production from a QCD plasma.
Titel: |
Smooth interpolation between thermal Born and LPM rates
|
---|---|
Autor/in / Beteiligte Person: | Ghiglieri, J. ; Laine, M. ; Laboratoire de physique subatomique et des technologies associées (SUBATECH) ; Université de Nantes - UFR des Sciences et des Techniques (UN UFR ST) ; Université de Nantes (UN)-Université de Nantes (UN)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-IMT Atlantique Bretagne-Pays de la Loire (IMT Atlantique) ; Institut Mines-Télécom Paris (IMT)-Institut Mines-Télécom Paris (IMT) |
Link: | |
Zeitschrift: | https://hal.archives-ouvertes.fr/hal-03394583 ; 2021, 2021 |
Veröffentlichung: | HAL CCSD, 2021 |
Medientyp: | report |
Schlagwort: |
|
Sonstiges: |
|