Measurement of the production cross section for Z gamma to nu nubar gamma in pp collisions at sqrt(s)7 TeV and limits on ZZ gamma and ZZ gamma gamma triple gauge boson couplings

A measurement of the Z gamma to nu nu-bar gamma cross section in pp
collisions at sqrt(s) = 7 TeV is presented, using data corresponding to an
integrated luminosity of 5.0 inverse femtobarns collected with the CMS
detector. This measurement is based on the observation of events with an
imbalance of transverse energy in excess of 130 GeV and a single photon in the
absolute pseudorapidity range abs(eta) < 1.4 with transverse energy above 145
GeV. The Z gamma to nu nu-bar gamma production cross section is measured to be
21.1 +/- 4.2 (stat.) +/- 4.3 (syst.) +/- 0.5 (lum.) fb, which agrees with the
standard model prediction of 21.9 +/- 1.1 fb. The results are combined with the
CMS measurement of Z gamma production in the l+ l- gamma final state (where l
is an electron or a muon) to yield the most stringent limits to date on triple
gauge boson couplings: abs(h[3,Z]) < 2.7E-3, abs(h[4,Z]) < 1.3E-5 for Z Z gamma
and abs(h[3,gamma]) < 2.9E-3, abs(h[4,gamma]) < 1.5E-5 for Z gamma gamma
couplings.