Hi all,
I tried to follow Kristof's presentation but got interrupted all the time by the phone... I have a few editorial comments
p.1: It would be good to state that DsDs is a CP-even final state before line 18 where previous measurements are given.
L.77: "if one forces the D meson to have zero lifetime" is nonsense. What you mean is to force the D0 daughters to come from the B vertex.
L.87: what's the background from wrong PV assignment? How is it treated?
Fig.1: I think this figure could go to additional material and be replaced by a short sentence. Caption: remove "only".
L.127: Lambda_b is upright and Lambda_c slanted. Use the template.
L.136: OK, I believe you. But I would have expected that the BDT allows for more poorly reconstructed B at low decay times (where the pointing doesn't add much).
L.139-143: why not use an iterative procedure?
L.192: The final states are identical but the Pt,eta distribution of Bd and Bs may not be to all level of precision. The relative efficiency is thus not strictly one.
L.208: Once you remove Fig 1 you gain some space for a short conclusion.
Cheers,
Patrick
On 11/08/2013 03:07 PM, Niels Tuning wrote:
Hi Kristof,
Only a few comments on the paper from my side (a few repeating what we said this morning).
Cheers, Niels
Abstract
- [It is surprising that the systematic error is two times smaller for the
Bs0->D-Ds+ lifetime. How comes?]
L.102 [Kristof, I would keep this sentence with 97% and 33%, because the fact that you cut the background with an additional factor 3 can be interesting.]
L.149 [Add a sentence where you say why the B- normalization is preferred over the B0 normalization channel.]
Fig.1 [Add label inside plot: 'LHCb simulation']
Fig.3 [Add label 'LHCb']
Fig.3 [You assumed tau=1.5 ps when defining the bin centres; how large is the effect on your measurement if you would assume tau=1.25 ps?]
Fig.4 [Make font of legend non-bold]
[Just a warning: the PRL justification seems not asked for by PRL anylonger.]
On Thu, 7 Nov 2013, Tjeerd Ketel wrote:
On Thu, 31 Oct 2013, Tjeerd Ketel wrote:
Dear colleagues,
Bfys Meeting Friday 8 November in N328 and Vidyo
9:30 - 9:55 Staff meeting (only permanent staff) 10:00 - 10:50 "Introduction and discussion of LHCb-PAPER-2013-060: Measurement of the B0s(bar) to Ds+ Ds- and B0s(bar) to D- Ds+ effective lifetimes" by Kristof de Bruyn
The presentation can be found at http://agenda.nikhef.nl/conferenceDisplay.py?confId=2622 and will be protected by lhcb, etc.
Vidyo link in Nikhef Bfys Meeting (at Institutes->Nikhef of Friday 21 June 2013) https://indico.cern.ch/conferenceDisplay.py?confId=255991 protected by PIN 1328.
Best regards, Tjeerd
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