+++ /dev/null
-#include "isajet/pilot.h"
- DOUBLE PRECISION FUNCTION SSALFS(Q2)
-C-----------------------------------------------------------------------
-C Strong coupling formula from page 201 of Barger and Phillips:
-C (using ALQCD4 for 4 flavor Lambda)
-C
-C Bisset's STRCPLH
-C-----------------------------------------------------------------------
-#include "isajet/sssm.inc"
-C
- DOUBLE PRECISION Q2,AS,TH5,TH6,PI
- DATA PI/3.14159265D0/
-C
- TH5=4*AMBT**2
- TH6=4*AMTP**2
- IF (Q2.LE.TH5)THEN
- AS=12*PI/(25*LOG(Q2/ALQCD4**2))
- ELSE IF(Q2.GT.TH5.AND.Q2.LE.TH6) THEN
- AS=25*LOG(Q2/ALQCD4**2)-2*LOG(Q2/TH5)
- AS=12*PI/AS
- ELSEIF(Q2.GT.TH6)THEN
- AS=25*LOG(Q2/ALQCD4**2)
- AS=AS-2*(LOG(Q2/TH5)+LOG(Q2/TH6))
- AS=12*PI/AS
- ENDIF
- SSALFS=AS
- RETURN
- END