Fig. 2 what is the peak around 20 GeV in the muon channel

Fig 2 shows the MET distriution in the electron channel. The peak of the QCD background component for MET~20 GeV is a reflection of the MT>40GeV cut applied at the same time. This introduces some turn on effect for MET.

line 295-298:

I propose to take out these lines. The E/p measurement itself is known better than 20% (see the E/p measurement). The large uncertainty at low momentum is due to additional effects like an estimation of the noise threshold effect that is necessary to go from the single particle response to something like a cluster that can be composed of several particles. Moreover, the uncertainty in the forward region is not estimated from the single hadron response.

The cluster energy resolution has not been studied, only know is the one for single particle. Moreover, the effect on pile-up is not know on the cluster energy.

The pile-up uncertaintes have to be evaluated in the analysis.

Ok, modified the statement suitably.

Table 7: I do not understand why you assigne an uncertainty on jet cleaning when there are no jets used in the analysis

What we mean is rather "MET cleaning" than jet cleaning, i.e. rejection of events with fake jet(s), because these likely contain fake MET. The muon W->munu analysis has been making the jet/MET cleaning cut (only in data) since the start of 7 TeV data-taking to reject events with bad jets or missing Et. Right now we are using loosened cuts (timing < 25ns) because of the muon rejection behavior of the January loose cuts. As we agreed this is a temporary solution and we will adopt a refined cleaning, that is still to be proposed by the Jet/MET group, for the upcoming paper. The modified requirement has an efficiency of 99.92%. To be conservative we take the remaining 93 events which do not pass jet-cleaning criteria as a fractional systematic, 0.07% on the cross-section.

The word "error" should be replaced by uncertainty everywhere

We understand and keep errors only where appropriate as e.g. in the last sentence of the Tab 9 caption.

-- MassimilianoBellomo - 07-Mar-2011