bfys-physics January 2013

bfys-physics@nikhef.nl

9 participants
8 discussions

[Bfys-physics] Bfys Meeting Friday 18 january at 9:30 in N328 and on EVO
by Tjeerd Ketel 09 Jun '14

09 Jun '14

Bfys Meeting Friday 18 january at 9:30 in N328 and on EVO* Paper introduction and discussion: 9:30 "A search for D+(s) to pi+mu+mu- and D+(s) to pi-mu+mu+ decays" by Francesco Dettori http://cds.cern.ch/record/1504407 Veldhoven rehearsals: 10:30 "A new window for new physics in Bs decays to two muons" by Rob Knegjens 11:00 "The Bs meson decay in two muons: a search for rare beauty" by Serena Oggero 11:30 "Measurement of the angle gamma in the unitary triangle in time-dependent Bs to DsK decays at the LHCb experiment" by Manuel Schiller The presentations will be available (protected under lhcb, etc.) on the Nikhef agenda page and comments can be directly mailed to the speakers. Best regards, Tjeerd *)Today Vidyo could not provide the same service as EVO in our meeting room at Nikhef, therefore I decided to book this meeting again on EVO. Universe is the community, as LHCb has been removed. As a test we can open a room in Vidyo on Friday at 12:00. ========================================================= http://agenda.nikhef.nl/conferenceDisplay.py?confId=2361 ========================================================= You have BOOKED a meeting in SeeVogh Research Network (http://research.seevogh.com). Title: Nikhef Description: Bfys Meeting 9:30-12:00 Community: Universe Password: n328 Meeting Access Information: - Meeting URL SeeVogh R.N. http://research.seevogh.com/join?meeting=MsMiMI2u2IDnDe999aDt9s EVO International http://evo.caltech.edu/evoNext/koala.jnlp?meeting=MsMiMI2u2IDnDe999aDt9s - Password: n328 - Phone Bridge ID: 627 7875 Password: 6287 =========================================================

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[Bfys-physics] Comments on D-> pi mu mu
by Francesco Dettori 08 Feb '13

08 Feb '13

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(a)nikhef.nl francesco.dettori(a)cern.ch --------------------

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[Bfys-physics] Reminder Bfys Meeting Friday 1 Februaty at 9:45
by Tjeerd Ketel 05 Feb '13

05 Feb '13

Bfys Meeting Friday 1 Februaty at 9:45 in N328 and on Vidyo Paper introduction and discussion: 9:45 "Observation of the B0s to psi(2S) eta and B0(s) to psi(2S) pi+ pi- decays" http://cds.cern.ch/record/1508049 Best regards, Tjeerd As no volunteer showed up we will go throught the pages and collect comments. We received already comments by Patrick. ========================================================= http://agenda.nikhef.nl/conferenceDisplay.py?confId=2375 ========================================================= You can join the Vidyo from https://indico.cern.ch/conferenceDisplay.py?confId=232076 or from Vidyo: Name of the room: Nikhef_Bfys_Meeting Extension: 9232076 PIN: The room has been protected by a pin number: 1328 Description: 9:45-10:45 h =========================================================

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[Bfys-physics] Bfys Meeting Friday 1 Februaty at 9:45 in N328 and on Vidyo
by Tjeerd Ketel 01 Feb '13

01 Feb '13

Bfys Meeting Friday 1 Februaty at 9:45 in N328 and on Vidyo I am looking for a volunteer to introduce this paper Paper introduction and discussion: 9:45 "Observation of the B0s to psi(2S) eta and B0(s) to psi(2S) pi+ pi- decays" http://cds.cern.ch/record/1508049 Best regards, Tjeerd ========================================================= http://agenda.nikhef.nl/conferenceDisplay.py?confId=2375 ========================================================= You can join the Vidyo from https://indico.cern.ch/conferenceDisplay.py?confId=232076 Name of the room: Nikhef_Bfys_Meeting Extension: 9232076 PIN: The room has been protected by a pin number: 1328 Description: 9:45-10:45 h =========================================================

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[Bfys-physics] Comments to the paper
by Patrick Koppenburg 18 Jan '13

18 Jan '13

Dear all, Here are my comments to the D->mumupi paper. General comments: How was the binning chosen? The fact that you see leakage from the resonances into your central bin seems to defeat the point of binning. Couldn't you rebin in a more appropriate way. More generally, if you do a search without any apriori knowledge, why do you bin at all? Cannot you publish a background-subtracted dimuon spectrum or Dalitz plane? The usual question about multiple candidates : Can you prove that your choice of best candidate does not bias the result. i.e. are BDT and vertex chi2 uncorrelated? See LHCb-INT-2011-009. Line 99: is there any kinematic requirement that aligns the momentum distribution of D->3pi to D->pimumu? The muon-ID strongly biases momenta. That affects your statement in line 132 that the shape is "well defined" Writing: I find it could be improved a lot. Line 7: remove the spaces inu mu- mu+. Line 9: why "see Fig 1" here? The figure doesn't illustrate the sentence. Line 12: best -> most stringent (?) Line 15: "Throughout... implied": why this sentence here? Line 23: "subject of great interest at LHCb". That may be true but is of no interest to the outside world. What about a sentence saying LHCb is very competitive in RD charm? Line 25: add a comma at end of line. Line 26: samples -> bins. Remove the 2nd for. Line 47: The L0 _trigger_ Line 48: I have nothing a priori against ">" in text, but here some of the operators could easily be replaced by words, like > 1.68 -> exceeds. Why the parenthesis around GeV/c? You could write "exceeds (1.3 GeV/c)^2". Line 49: have _a_ momentum ... and _an_ impact Line 52: "be," -> is Line 55-56: The last sentence is obvious. Remove. Line 60: $\chi^2_{NDF}$ -> $\chi^2/{\rm NDF}$. $\chi^2<30$ of what? Is that a chi^2 or a chi^2/dof? Line 62, 75, 78: Please do not use Loki functors in publications. You could replace DIRA by some angle (e.g. $\theta_d$) or just repeat the definition in line 75. ("and known as the DIRA" would be "known as DIRA" anyway). Line 69: so -> and thus (?) Line 72: the BDT trains -> the BDT is trained Line 78: MAXDOCA is undefined. Line 80: "The variable" ... and then the equation Line 93: are forbidden -> must not Line 98: rewrite as "... except for the requirement that two of the tracks have hits in the muon system." Line 106: as the -> in the (?) Line 108: in the m(...) -> in m(...) Line 113: know -> known Line 129: Please say how the tails are fixed. MC? Line 142: _the_ large width. Rewrite as "The statistical significance of the two observed peaks are 6.1 and 6.2 for D->eta(pi) and Ds->eta(pi), respectively." (assuming that's what it means). Line 147: As no ... windows upper limits. Line 165: "a number" what number? Line 196: "imperfect emulation". The online reconstruction is not emulated but re-run. What do you mean? Table 3: Effect -> Systematic error Cheers, Patrick -- ======================================================================== Patrick Koppenburg Nikhef, Amsterdam http://www.koppenburg.org/address.html

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Re: [Bfys-physics] Vidyo connections
by Patrick Koppenburg 18 Jan '13

18 Jan '13

On 01/18/2013 09:24 AM, Patrick Koppenburg wrote: > Let's meet in Tjeerd's Vidyo room: > > 1) Go to https://vidyoportal.cern.ch/flex.html > 2) log in with CERN account > 3) search for Tjeerd Ketel > 4) Join his room > > Manual and I are there already. > > See you > > Patrick > is nikhef still alive?? We feel a bit lonely in Tjeerd's Vidyo room. -- ======================================================================== Patrick Koppenburg Nikhef, Amsterdam http://www.koppenburg.org/address.html

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[Bfys-physics] Tuesday meeting tomorrow (fwd)
by Tjeerd Ketel 15 Jan '13

15 Jan '13

Dear all, For 14h I have reserved N328 to follow the Thuesday meeting at Nikhef with Vydio (if I get it working with the Polycom). Best regards, Tjeerd ---------- Forwarded message ---------- Date: Mon, 14 Jan 2013 17:39:16 +0000 From: Roger Forty <Roger.Forty(a)cern.ch> To: "lhcb-general (LHCb General mailing list)" <lhcb-general(a)cern.ch> Subject: Tuesday meeting tomorrow Dear Colleagues, The first Tuesday meeting of 2013 will take place tomorrow at 14:00 CET in the usual room (Filtration Plant, 222/R-001), Vidyo available. The agenda is here: https://indico.cern.ch/conferenceDisplay.py?confId=204489 Richard will report from the recent LHC Workshop in Evian, concerning aspects for LHCb in Run II (after the shutdown), and then Vincenzo will give an overview and outlook of the analyses in the Charmless working group. Hope to see you there, Roger

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[Bfys-physics] First circulation of publication draft for PAPER-2012-051, A search for $D^+_{(s)} \to \pi^+\mu^-\mu^-$ and $D^+_{(s)} \to \pi^-\mu^+\mu^+$ decays (fwd)
by Tjeerd Ketel 14 Jan '13

14 Jan '13

Dear colleagues, I have reserved N328 for Friday morning 18 January to discuss this paper at Nikhef. Who wants to introduce it? Best regards, Tjeerd ---------- Forwarded message ---------- Date: Fri, 11 Jan 2013 12:47:01 +0000 From: Ulrik Egede <U.Egede(a)imperial.ac.uk> To: LHCb General mailing list <lhcb-general(a)cern.ch> Subject: First circulation of publication draft for PAPER-2012-051, A search for $D^+_{(s)} \to \pi^+\mu^-\mu^-$ and $D^+_{(s)} \to \pi^-\mu^+\mu^+$ decays Resent-Date: Fri, 11 Jan 2013 13:49:51 +0100 Resent-From: <lhcb-general-dynamic(a)cern.ch> Dear Colleagues, A paper is available for your comments: Title : A search for $D^+_{(s)} \to \pi^+\mu^-\mu^-$ and $D^+_{(s)} \to \pi^-\mu^+\mu^+$ decays Journal : PLB Contact authors : Ed Greening, Benoit Viaud Reviewers : Diego Martinez Santos (chair), Gerhard Raven EB reviewer : Eugeni Grauges Pous Analysis note : ANA-2012-025 Deadline : 25-Jan-2013 e-group : lhcb-paper-2012-051-reviewers Link : http://cds.cern.ch/record/1504407 Extra authors : Twiki : https://twiki.cern.ch/twiki/bin/viewauth/LHCbPhysics/D2hmumu The following institutes are requested to make institutional comments: NSC KIPT, Kharkiv, Ukraine, Universitaet Rostock, Germany CPPM, Marseille, France KINR, Kyiv, Ukraine Roma Tor Vergata, Roma, Italy EPFL, Lausanne, Switzerland NIKHEF, Netherlands Please send any comments via the CDS system. It is the responsibility of the contact authors to provide replies on all comments made. Subsequent modification to the publication are made in consultation with the referees and during the EB reading. Following this, there will be a final meeting of the editorial board with contact authors and reviewers present where final decisions are made. As the last step a short presentation is given to the collaboration and the paper is sent for publication. You can find all paper and conference report drafts open for comments via the EB web-page, by clicking on Current Drafts. http://lhcb.web.cern.ch/lhcb/lhcb_page/collaboration/organization/editorial… Regards, Ulrik Egede -- ===================================================================== Latest news from Editorial Board: - Update front page of PAPERs and CONFs to include license. See template. - Use new reference for trigger. See template - Instructions for submitting to PLB and JHEP updated in FAQ, http://cern.ch/go/Xz7d - Acknowledgements and detector section updated in template. Make sure to update your template. - When the arXiv and journal bibliographic data disagree (e.g author initials or titles), the journal information should always be used. - Remember to check out new template from SVN each time you start editing a new document. ===================================================================== Prof. Ulrik Egede, Tel : +44 20 759 47688 Department of Physics, Fax : +44 20 782 38830 Blackett Laboratory, E-mail : U.Egede(a)imperial.ac.uk Imperial College London, London SW7 2AZ, UK.

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bfys-physics January 2013