TY - JOUR
T1 - General method for determining the masses of semi-invisibly decaying particles at hadron colliders
AU - Matchev, Konstantin T.
AU - Park, Myeonghun
PY - 2011/8/1
Y1 - 2011/8/1
N2 - We present a general solution to the long-standing problem of determining the masses of pair-produced, semi-invisibly decaying particles at hadron colliders. We define two new transverse kinematic variables MCT and MCT, which are suitable one-dimensional projections of the contransverse mass MCT. We derive analytical formulas for the boundaries of the kinematically allowed regions in the (MCT,MCT) and (MCT,MCT) parameter planes and introduce suitable variables DCT and DCT to measure the distance to those boundaries on an event per event basis. We show that the masses can be reliably extracted from the end-point measurements of MCTmax and DCTmin (or DCTmin). We illustrate our method with dilepton tt̄ events at the LHC.
AB - We present a general solution to the long-standing problem of determining the masses of pair-produced, semi-invisibly decaying particles at hadron colliders. We define two new transverse kinematic variables MCT and MCT, which are suitable one-dimensional projections of the contransverse mass MCT. We derive analytical formulas for the boundaries of the kinematically allowed regions in the (MCT,MCT) and (MCT,MCT) parameter planes and introduce suitable variables DCT and DCT to measure the distance to those boundaries on an event per event basis. We show that the masses can be reliably extracted from the end-point measurements of MCTmax and DCTmin (or DCTmin). We illustrate our method with dilepton tt̄ events at the LHC.
UR - http://www.scopus.com/inward/record.url?scp=79961107747&partnerID=8YFLogxK
U2 - 10.1103/PhysRevLett.107.061801
DO - 10.1103/PhysRevLett.107.061801
M3 - Article
AN - SCOPUS:79961107747
SN - 0031-9007
VL - 107
JO - Physical Review Letters
JF - Physical Review Letters
IS - 6
M1 - 061801
ER -