inverse femtobarn  The inverse femtobarn (fb−1) is a measurement
of particle-collision events per femtobarn; a measure of both
the collision number and the amount of data collected.   One
inverse femtobarn corresponds to approximately
100 trillion (1012) proton-proton collisions. Over a period of
time, two streams of particles with a cross-sectional area,
measured in femtobarns, are directed to collide. The total
number of collisions is directly proportional to
the luminosity of the collisions measured over this time.
Calculate the collision count by multiplying the integrated
luminosity by the sum of the cross-section for those collision
processes. This count is then expressed as inverse femtobarns
for the time period (100 fb−1 in nine months).  Note: Do not use
inverse femtobarn in the public section of the website where it
can be avoided - it is unnecessarily technical. Convert to
approximate numbers of collisions instead.   You are here