Dear Tjeerd,

Here are my comments on the Lb paper. It needs a serious revision...

Physics: You seem to be constraining the signal to be positive. How do you then average the L and D samples? E.g. in Fig., the upward fluctuation at the Lb mass in D could be balanced by a negative fluctuation in L.

General: The introduction needs a revision. Take the first sentence; it's grammar implies a "concept" is a "study". Try to make it simpler. In L.4-5 yo define physical particles "by a mixing". We don't think mixing defines particles. Generally, the theoretical introduction in L.2-19 is interesting but not relevant to the paper as you do not measure any of these angles nor put limits. You can shorten it a lot. L.274-284: This explanation should go to the introduction, so you can quickly refer to it in the conclusion.

In Section 5 you make our simulation look really bad. We _do_model L0, we _can_ measure the reco efficiency. The question is whether you rely on it or not. Please rephrase. L.231-4: If the PIDCalib uncertainties are smaller than this difference, this is overestimating the systematic. If they are larger, it is potentially underestimating it due to fluctuations. Either way: Use PIDCalib uncertainties, not the difference.

Section 6: I now understand that not using FC would be flip-floppping. But why can't I get 68% CL intervals?

Why do you have paragraph vertically separated without indents?

Title page: You write end of the paper, but you put the authors at the beginning.

L.24: 53 -> fifty L.26: why is the b->s transition "standard"? L.27: there are _always_ extra Feynman diagrams. Please explain why they are relevant. L30-31: this is obvious. Fig.1: usually the spectator is put at the bottom. Move quark labels so they do not touch lines. B0 should be centered between d and bbar. In c the top of "d" is missing. L.68: the PV -> a PV (new template) L.83: Label your Ks and L as Downstream (D) and Long (L) as we have done in many previous papers. L.82 and 84: event -> candidate L.89-90: explain that else the efficiency would be lower L.94: has this DIRA cut any effect once DTF is applied? If not remove. L.95-113: There are too many instances of "required to". Rephrase. L.130: MeV/c^2 L.140: Do you check the 2 BTDs are consistent? L.144: event -> candidate L.146: explain how you determine the combinatoric background. L.154: highest ET photon is kept. Fig.2: Label with L and D. In all figures remove "in the 2011 and 2012 data". L.164-166: Is that needed? L.168 and many other places: Number of signal events -> signal yield (do not label them as events) L.171 and 173: events -> candidates. This sentence is a bit repetitive. L.193 and Eq.4: Isn't is just B(K0->pi^+pi^-)? L.193: remove from the Particle... Table 1: replace a,b,c,d by the corresponding decay. tot should be in roman. L.200: One of the dominant -> the largest. L.205-6: Isn't this obvious? L.229: statistics in the data -> size of data L.269: write the limit rather than explaining how it's obtained. [12] Fr`ere [19] Use the 2014 PDG

Cheers,

Patrick

On 27/03/15 14:49, Tjeerd Ketel wrote:

Dear all,

The Z boson paper comments will be collected by Marcel. Please send them before 2 April as Cc.

The Lambda_b0 paper comments will be collected by me. Please send them latest 2 April as Cc.

Best regards, Tjeerd

On Wed, 25 Mar 2015, Tjeerd Ketel wrote:

...

Dear colleagues,

Bfys Meeting Friday 27 March at 9:30 in N328 and Vidyo

9:30 - 9:55 Staff meeting (permanent staff only)

10:00 - 10:30 Discussion of LHCb-Paper-2015-001 "Measurement of the Z boson cross-section and ratios of electroweak boson cross-sections in pp collisions at sqrt(s)=7 TeV in the forward region" Deadline : 03-Apr-2015 Link : https://cds.cern.ch/record/2002513

10:30 - 11:00 Discussion of LHCb-Paper-2015-019 "Search for the Lambda_b0 to Lambda eta and Lambda_b0 to Lambda eta' decays with the LHCb detector" Deadline : 07-Apr-2015 Link : https://cds.cern.ch/record/2002894

Vidyo link in Nikhef Bfys Meeting (at Institutes->Nikhef of Friday 24 October 2014) https://indico.cern.ch/event/348856/ protected by PIN 1328.

Material (and also Vidyo link) at https://indico.nikhef.nl/conferenceDisplay.py?confId=146

Best regards, Tjeerd

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