bfys-physics July 2013

bfys-physics@nikhef.nl

8 participants
15 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] First circulation of publication draft for PAPER-2013-047, Observation of the decay $B_c^+\to J/\psi K^+K^- pi^+$ (fwd)
by Tjeerd Ketel 08 Aug '13

08 Aug '13

Dear all, I am looking for a volunteer for this paper. We can try to discuss it this Friday, August 2nd. Otherwise we will discuss it on Friday Augyst 9th, which is also the deadline for comments. Best regards, Tjeerd ---------- Forwarded message ---------- Date: Fri, 26 Jul 2013 21:25:32 +0000 From: Rolf Oldeman <rudolf.oldeman(a)cern.ch> To: "lhcb-general (LHCb General mailing list)" <lhcb-general(a)cern.ch> Subject: First circulation of publication draft for PAPER-2013-047, Observation of the decay $B_c^+\to J/\psi K^+K^- pi^+$ Dear Colleagues, A paper is available for your comments: Title : Observation of the decay $B_c^+\to J/\psi K^+K^- pi^+$ Journal : JHEP Contact authors : Victor Egorychev, Ivan Polyakov Reviewers : Patrick Robbe (chair), Xuhao Yuan EB reviewer : Nigel Watson EB readers : Frederic Machefert, Carla Gobel Analysis note : ANA-2013-051 Deadline : 09-Aug-2013 e-group : lhcb-paper-2013-047-reviewers Link : http://cds.cern.ch/record/1564931 Authors : LHCb + Ivan Polyakov Twiki : https://twiki.cern.ch/twiki/bin/viewauth/LHCbPhysics/Bc2PsiKKpi The following institutes are requested to make institutional comments: Cincinnati, United States Pisa, Italy NSC KIPT, Kharkiv, Ukraine, Universitaet Rostock, Germany CPPM, Marseille, France 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 _board/default.html Regards, Rolf Oldeman

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[Bfys-physics] In case you missed it... : 3.7sigma in K*mumu, globally ?
by Niels Tuning 23 Jul '13

23 Jul '13

Hi friends! This is the highlight of EPS, if you ask me! You should definitely read this: http://arxiv.org/pdf/1307.5683v1.pdf The authors fitted for the Wilson coeficients C7 and C9, and a single shift of C9 could explain all tensions in the observed angular distributions by LHCb. They claim 3.7sigma deviation (4.5 sigma at 1<q2<6) and speculate about the existence of a Z' gauge boson... Cheers, Niels

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[Bfys-physics] LHCB-PAPER-2013-034-001-COMMENT-007: review received (fwd)
by Tjeerd Ketel 18 Jul '13

18 Jul '13

Dear all, We got a fast reply and a reference to their twiki with a draft inluding the modifications. I will tell them this afternoon that we are happy with their response. Best regards, Tjeerd ---------- Forwarded message ---------- Date: Wed, 17 Jul 2013 15:04:53 +0200 From: CERN Document Server Submission Engine <cds.support(a)cern.ch> To: tjeerd(a)nikhef.nl Subject: LHCB-PAPER-2013-034-001-COMMENT-007: review received Dear LHCb Colleague, Your comment LHCB-PAPER-2013-034-001-COMMENT-007 on draft LHCB-PAPER-2013-034-001 (entitled: 'Branching fraction ratio and $CP$ asymmetry measurements of the $B^+ \to K_S^0 \pi^{+}$ and $B^{+} \to K_S^0 K^+$ decays.') has been responded to by Aurelien Martens of the reviewers. The review will soon be available at the following URL: <http://cds.cern.ch/record/1562591> Kind regards, CERN Document Server.

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[Bfys-physics] LHCB-PAPER-2013-034-001-COMMENT-005: review received (fwd)
by Tjeerd Ketel 16 Jul '13

16 Jul '13

Dear all, To my embarrassment I overlooked the quick response to the comments. I will answer them today after feedback with you. Best regards, Tjeerd ---------- Forwarded message ---------- Date: Wed, 10 Jul 2013 20:46:32 +0200 From: CERN Document Server Submission Engine <cds.support(a)cern.ch> To: tjeerd(a)nikhef.nl Subject: LHCB-PAPER-2013-034-001-COMMENT-005: review received Dear LHCb Colleague, Your comment LHCB-PAPER-2013-034-001-COMMENT-005 on draft LHCB-PAPER-2013-034-001 (entitled: 'Branching fraction ratio and $CP$ asymmetry measurements of the $B^+ \to K_S^0 \pi^{+}$ and $B^{+} \to K_S^0 K^+$ decays.') has been responded to by Aurelien Martens of the reviewers. The review will soon be available at the following URL: <http://cds.cern.ch/record/1560924> Kind regards, CERN Document Server.

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[Bfys-physics] LHCb-2013-042 further comments
by Rob Lambert 15 Jul '13

15 Jul '13

Dear All, If there are any other comments on the B(s) -> Kshh paper, please let me know today. I'm compiling the comments from the meeting and will submit comments on CDS at 17:00 today. Thanks, Rob ------------------------------------------ Robert Lambert FOM-VU-NIKHEF-Bfys LHCb Email: rob.lambert(a)cern.ch ------------------------------------------ Nikhef N251 Tel: +31 20 592 2131 Fax: +31 20 592 5155 ------------------------------------------ CERN, 13-1-018 Tel: +41 22 767 4024 Fax: +41 22 766 8109 ------------------------------------------ ________________________________________ From: bfys-physics-bounces(a)nikhef.nl [bfys-physics-bounces(a)nikhef.nl] on behalf of Tjeerd Ketel [tjeerd(a)nikhef.nl] Sent: 09 July 2013 09:37 To: bfys-physics(a)nikhef.nl Subject: [Bfys-physics] Reminder Bfys paper discussion in N328 Dear all, At 10h we start to discuss the 2 remaining papers in N328 The permanent staff meeting of 9-10h should be finished by then. Best regards, Tjeerd _______________________________________________ Bfys-physics mailing list Bfys-physics(a)nikhef.nl https://mailman.nikhef.nl/mailman/listinfo/bfys-physics

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[Bfys-physics] reply to LHCB-PAPER-2013-035-001-COMMENT-012
by Veerle Heijne 13 Jul '13

13 Jul '13

Dear all, We received a response on our comments on the BstoDphi paper, you can have a look at the link below: http://cds.cern.ch/record/1561730 Cheers, Veerle Begin forwarded message: > From: CERN Document Server Submission Engine <cds.support(a)cern.ch> > Date: 12 juli 2013 18:48:39 GMT+02:00 > To: <veerle.heijne(a)cern.ch> > Subject: LHCB-PAPER-2013-035-001-COMMENT-012 (a comment has been made on your comment) > > Dear LHCb Colleague, > The comment (LHCB-PAPER-2013-035-001-COMMENT-004) that you made on LHCB-PAPER-2013-035-001 > (entitled: 'Observation of the decay $B_s^0\to\bar{D}^0\phi$') has itself been commented on by Stefania Ricciardi [CERN - PH/ULB] (stefania.ricciardi(a)cern.ch). > > This new comment (LHCB-PAPER-2013-035-001-COMMENT-012) may be seen at > http://cds.cern.ch/record/1561730 > > > Best regards, > The CERN Document Server Server support Team

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[Bfys-physics] Paper-reading effort. Thanks!
by Marcel Merk 10 Jul '13

10 Jul '13

Thanks to all who have contributed to the effort of reviewing 4 papers in one week during holiday times. It was quite a job, but I noted that we managed to give thorough and detailed feedback on all four papers. This is important for LHCb. I think we did well and thanks to Tjeerd for efficient organisation. Cheers, - Marcel

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[Bfys-physics] Comments on Paper 2013-034
by Patrick Koppenburg 09 Jul '13

09 Jul '13

Hi Tjeerd, Here are my textual comments on the Ksh paper. There's one more fundamental thing: They should not assess a systematic error for the BDT selection. That's already accounted for in the statistical error unless they believe your BDT efficiency measurement is biased. In that case there are better methods to obtain a systematic error. A BDT is nothing but a cut and they do not add systematics for all their other cuts. L.2, 164: B meson L.11: I would find Feynman diagrams helpful. L.52: b-hadron L.62: say charge conjugation is implied. L.81: Why must the B be displaced from "the PV" by 1mm and its vertex be "well separated" from all PVs? Try to rewrite that in a sensible order, starting with the Ksh vertex and then make statements about the B. L.105 N_S and N_B should be in math mode (at least the N, maybe not the B and S). L.132: MeV/c^2 L.137: These r_{B->...} are ugly and not re-used anywhere. L.141: This is surprising. We would have expected an excess of K+ over K- in background. L.157: Formally -> At first order Do you really need to spell out Eq 4 and 5 separately? And why do you merge Det+Prod in one asymmetry? It's 2 different things. L.168: You should not assess a systematic error for your BDT selection. That's already accounted for in the statistical error unless you believe your BDT efficiency measurement is biased. In that case there are better methods to obtain a systematic error. L.177: Are they in reasonable agreement before or after they are reweighted? Table 1: Make sure all numbers are in math mode L.212: in B->J/psiK decays. L.215-216: That sounds like only B->J/psiX decays can be used at LHCb (you could have normalised to B->D(KK)pi to take one example). Remove that sentence and say what you do rather than what you do not do. We suggest you rewrite the paragraph saying you normalise to KsK to J/psiK and then correct for the kaon asymmetry for Kspi. L.232: why only 1fb^-1? L.234-238: That's a long sentence in the wrong order. Fit describe the fit and then the FC method. L.248: B_c^+ meson L.257: remove "corresponding to data". Fig.2: increase space above caption [37] Add arxiv http://arxiv.org/abs/arXiv:0907.2256 Cheers, Patrick -- ======================================================================== Patrick Koppenburg Nikhef, Amsterdam http://www.koppenburg.org/address.html

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[Bfys-physics] Bfys Meeting Friday 5 July 9:30 in N328 (and Vidyo)
by Tjeerd Ketel 09 Jul '13

09 Jul '13

Dear colleagues, We have 4 papers to comment on and I am looking for volunteers. Please, let me know as soon as possible which paper you would like to introduce and if Friday 5 July would be fine for you. As a first attempt I reserved next week Friday morning for it, but we may discuss one or two papers at a different time if that is more suitable. Best regards, Tjeerd Bfys Meeting Friday 5 July 9:30 in N328 (and Vidyo) 9:30-12 Introductions and short discussions of the following papers (still in order of announcement) LHCb PAPER-2013-037: "Measurement of form factor independent observables in the decay $B^0\to K^{*0}\mu^+\mu^-$" Link : https://cds.cern.ch/record/1557918 Deadline : 09-Jul-2013 LHCb PAPER-2013-034: "Branching fraction ratio and $CP$ asymmetry measurements of the $B^+ \to K_S^0 \pi^{+}$ and $B^{+} \to K_S^0 K^+$ decays" Link : https://cds.cern.ch/record/1557920 Deadline : 09-Jul-2013 LHCb PAPER-2013-042: "First observation of the decays $B_s^0 \to K_S^0 K^\pm \pi^\mp$ and $B_s^0 \to K_S^0 \pi^+ \pi^-$ and branching fraction measurements of $B_{(s)}^0$ decays to $K_S^0\pi^+\pi^-$, $K_S^0K^\pm \pi^\mp$ and $K_S^0 K^+ K^-$ final states" Link : https://cds.cern.ch/record/1558155 Deadline : 10-Jul-2013 LHCb PAPER-2013-035: "Observation of the decay $B_s^0\to\bar{D}^0\phi$" Link : https://cds.cern.ch/record/1558181 Deadline : 10-Jul-2013 Presentation can be found at http://agenda.nikhef.nl/conferenceDisplay.py?confId=2535 and will be protected by lhcb, etc. Vidyo link in Nikhef Bfys Meeting at LHCb meetings of the week protected by PIN 1328

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bfys-physics July 2013