Hi all,

"not completely satisfactory" is a nice way of phrasing it. For instance:

...

• Possible peaking backgrounds: did you consider the possibility of the

following decay: D-> rho0 (-> pi pi) mu nu? It has a high branching

fraction

...

and needs only one misidentification.

Such a background will occur at masses lower than the D mass. Only fully reconstructed peaking backgrounds are explicitly modelled in the fit. An acceptable chi2 is obtained, so we are not strongly motivated to include all possible components in the fit if the net result will not change significantly.

Do they know what the mass of the neutrino is? What can we do to "strongly motivate" them? Can the referees help?

Cheers,

Patrick

On 02/07/2013 05:23 PM, Francesco Dettori wrote:

Dear all,

We have got a reply to our comments concerning the paper: LHCB-PAPER-2012-051-001.

https://cds.cern.ch/record/1514042?

I do not find their answers completely satisfactory in some parts, but at least they have removed the problem of the mid-q^2 bin by merging it to the rho/omega region.

I don't have other major concerns, let me know if you want to comment back something.

cheers, Francesco

On Thursday 07 Feb 2013 11:21:11 Francesco Dettori wrote: |Dear all, | |since I didn't get any reply I've posted on CDS our comments on the paper |this morning. | |cheers, | Francesco | | |---- Forwarded message ---- | ||Dear LHCb Colleague, || || Your comment: document LHCB-PAPER-2012-051-001-COMMENT-004 has || been || ||correctly received. || ||It will be soon added to our Document Server. || ||The comment may be found at this URL: http://cds.cern.ch/record/1508066 ||It may also be viewed from the link 'View the N comments' of the document ||LHCB-PAPER-2012-051-001-COMMENT-004 (entitled: 'A search for $D^+_{(s)} \to ||\pi^+\mu^-\mu^-$ and $D^+_{(s)} \to \pi^-\mu^+\mu^+$ decays'). || ||If you detect an error please let us know by sending an email to ||cds.support@cern.ch. || || || ||Thank you for your comments. | |On Thursday 24 Jan 2013 15:04:22 Francesco Dettori wrote: || Dear all, || ||in attachment you can find a summary of the comments on the paper on D-> pi ||mu mu. So far it includes Patrick and Kristof's comments, beside mine. If ||anybody else wants to add other comments I'll integrate them. ||If not Tjeerd would you upload them on behalf of the group? || || cheers, || Francesco || ||-------------------- || || Francesco Dettori || NIKHEF || +31 20 592 2230 (Nikhef) || +41 22 76 76284 (CERN) || fdettori@nikhef.nl || francesco.dettori@cern.ch || ||-------------------- | |-------------------- | Francesco Dettori | NIKHEF | +31 20 592 2230 (Nikhef) | +41 22 76 76284 (CERN) | fdettori@nikhef.nl | francesco.dettori@cern.ch |-------------------- |_______________________________________________ |Bfys-physics mailing list |Bfys-physics@nikhef.nl |https://mailman.nikhef.nl/mailman/listinfo/bfys-physics

---

Francesco Dettori NIKHEF +31 20 592 2230 (Nikhef) +41 22 76 76284 (CERN) fdettori@nikhef.nl francesco.dettori@cern.ch

---

---

Bfys-physics mailing list Bfys-physics@nikhef.nl https://mailman.nikhef.nl/mailman/listinfo/bfys-physics

Hi Patrick,

yes I agree. That was also my main "not satisfaction". An acceptable chi2 does not mean the fit model is correct (especially if you are searching for rare decays).

cheers, Francesco

On Friday 08 Feb 2013 10:07:49 Patrick Koppenburg wrote: |Hi all, | |"not completely satisfactory" is a nice way of phrasing it. For instance: |> > - Possible peaking backgrounds: did you consider the possibility of the |> > following decay: D-> rho0 (-> pi pi) mu nu? It has a high branching |> |> fraction |> |> > and needs only one misidentification. |> |> Such a background will occur at masses lower than the D mass. Only |> fully reconstructed peaking backgrounds are explicitly modelled in the |> fit. |> An acceptable chi2 is obtained, so we are not strongly motivated to |> include all possible components in the fit if the net result will not |> change significantly. | |Do they know what the mass of the neutrino is? What can we do to |"strongly motivate" them? Can the referees help? | |Cheers, | |Patrick | |On 02/07/2013 05:23 PM, Francesco Dettori wrote: |> Dear all, |> |> We have got a reply to our comments concerning the paper: |> LHCB-PAPER-2012-051-001. |> |> https://cds.cern.ch/record/1514042? |> |> I do not find their answers completely satisfactory in some parts, |> but at least they have removed the problem of the mid-q^2 bin by merging |> it to the rho/omega region. |> |> I don't have other major concerns, |> let me know if you want to comment back something. |> |> cheers, |> |> Francesco |> |> On Thursday 07 Feb 2013 11:21:11 Francesco Dettori wrote: |> |Dear all, |> | |> |since I didn't get any reply I've posted on CDS our comments on the paper |> |this morning. |> | |> |cheers, |> | |> | Francesco |> | |> |---- Forwarded message ---- |> | |> ||Dear LHCb Colleague, |> || |> || Your comment: document LHCB-PAPER-2012-051-001-COMMENT-004 has |> || been |> || |> ||correctly received. |> || |> ||It will be soon added to our Document Server. |> || |> ||The comment may be found at this URL: http://cds.cern.ch/record/1508066 |> ||It may also be viewed from the link 'View the N comments' of the |> ||document LHCB-PAPER-2012-051-001-COMMENT-004 (entitled: 'A search for |> ||$D^+_{(s)} \to \pi^+\mu^-\mu^-$ and $D^+_{(s)} \to \pi^-\mu^+\mu^+$ |> ||decays'). |> || |> ||If you detect an error please let us know by sending an email to |> ||cds.support@cern.ch. |> || |> || |> || |> ||Thank you for your comments. |> | |> |On Thursday 24 Jan 2013 15:04:22 Francesco Dettori wrote: |> || Dear all, |> || |> ||in attachment you can find a summary of the comments on the paper on D-> |> ||pi mu mu. So far it includes Patrick and Kristof's comments, beside |> ||mine. If anybody else wants to add other comments I'll integrate them. |> ||If not Tjeerd would you upload them on behalf of the group? |> || |> || cheers, |> || Francesco |> || |> ||-------------------- |> || |> || Francesco Dettori |> || NIKHEF |> || +31 20 592 2230 (Nikhef) |> || +41 22 76 76284 (CERN) |> || fdettori@nikhef.nl |> || francesco.dettori@cern.ch |> || |> ||-------------------- |> | |> |-------------------- |> | |> | Francesco Dettori |> | NIKHEF |> | +31 20 592 2230 (Nikhef) |> | +41 22 76 76284 (CERN) |> | fdettori@nikhef.nl |> | francesco.dettori@cern.ch |> | |> |-------------------- |> |_______________________________________________ |> |Bfys-physics mailing list |> |Bfys-physics@nikhef.nl |> |https://mailman.nikhef.nl/mailman/listinfo/bfys-physics |> |> -------------------- |> |> Francesco Dettori |> NIKHEF |> +31 20 592 2230 (Nikhef) |> +41 22 76 76284 (CERN) |> fdettori@nikhef.nl |> francesco.dettori@cern.ch |> |> -------------------- |> _______________________________________________ |> Bfys-physics mailing list |> Bfys-physics@nikhef.nl |> https://mailman.nikhef.nl/mailman/listinfo/bfys-physics

-------------------- Francesco Dettori NIKHEF +31 20 592 2230 (Nikhef) +41 22 76 76284 (CERN) fdettori@nikhef.nl francesco.dettori@cern.ch --------------------