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520 discussions

[Bfys-physics] Slides on exotic long-lived particle searches for the Jamboree (v2)
by Pieter David 12 Dec '14

12 Dec '14

Dear all, Attached the updated version of my slides for Tuesday, incorporating the comments from the rehearsal, and with the last slide filled in. Any remaining comments and suggestions are still welcome. Thanks, Pieter

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[Bfys-physics] Bfys Meeting Friday 31 October at 10:00 in N328 and Vidyo
by Tjeerd Ketel 28 Nov '14

28 Nov '14

Dear colleagues, Bfys Meeting Friday 31 October at 10:00 in N328 and Vidyo 10:00 - 10:50 Rehearsal for Lunteren by Jacco de Vries "Matter-antimatter asymmetries: Measuring CP violation in B mixing at LHCb" 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 in http://agenda.nikhef.nl/conferenceDisplay.py?confId=2961 Uploaded with login lhcb and so on. Best regards, Tjeerd

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[Bfys-physics] Bfys Meeting Friday 28 November at 9:30 in N328
by Tjeerd Ketel 28 Nov '14

28 Nov '14

Dear colleagues, Bfys Meeting Friday 28 November at 9:30 in N328 and Vidyo 9:30 - 9:50 Staff meeting (only permanent staff) 10:00 - 10:50 "D* tau nu analysis with tau -> mu" by Greg Ciezarek 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 at http://agenda.nikhef.nl/conferenceDisplay.py?confId=2972 Uploaded with login lhcb and so on. Best regards, Tjeerd

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[Bfys-physics] Fwd: [Nikhef-theory-seminar] Today: Developments in Exclusive b->s l+l- Decays
by Robert Fleischer 13 Nov '14

13 Nov '14

Seminar starts in 8 minutes. Cheers, Robert Begin forwarded message: > From: Wouter Waalewijn <wwaalewijn(a)gmail.com> > Subject: [Nikhef-theory-seminar] Today: Developments in Exclusive b->s l+l- Decays > Date: 13 Nov 2014 13:45:58 GMT+1 > To: nikhef-theory-seminar(a)nikhef.nl > > Seminar starts in 15 minutes. > > Cheers, > Wouter > > On Nov 10, 2014 1:57 PM, "Wouter Waalewijn" <wouterw(a)nikhef.nl> wrote: > Dear all, > > Thursday we will be having a seminar at 2pm in room H331 by Danny van Dyk (Siegen). Further details can be found below. > > Hope to see you there, > Wouter > > ----------------------------------------------------------------------------------------------- > > Title: Developments in Exclusive b->s l+l- Decays > > Abstract: > I will review recent developments in theory predictions for, measurements of and constraints on new physics from exclusive b -> s l+l- decays. Special attention will be applied to the largest sources of uncertainties: hadronic form factors, and impact of broad charmonium resonances on the decay spectra. > _______________________________________________ > Nikhef-theory-seminar mailing list > Nikhef-theory-seminar(a)nikhef.nl > https://mailman.nikhef.nl/mailman/listinfo/nikhef-theory-seminar > _______________________________________________ > Nikhef-theory-seminar mailing list > Nikhef-theory-seminar(a)nikhef.nl > https://mailman.nikhef.nl/mailman/listinfo/nikhef-theory-seminar

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[Bfys-physics] Fwd: [Nikhef-theory-seminar] Thursday: Developments in Exclusive b->s l+l- Decays
by Robert Fleischer 10 Nov '14

10 Nov '14

Dear LHCb Colleagues, please find appended below the announcement of a theory seminar about rare B decays on Thursday. Hope to see you there! Best regards, Robert Begin forwarded message: > From: Wouter Waalewijn <wouterw(a)nikhef.nl> > Subject: [Nikhef-theory-seminar] Thursday: Developments in Exclusive b->s l+l- Decays > Date: 10 Nov 2014 13:57:19 GMT+1 > To: nikhef-theory-seminar(a)nikhef.nl > > Dear all, > > Thursday we will be having a seminar at 2pm in room H331 by Danny van Dyk (Siegen). Further details can be found below. > > Hope to see you there, > Wouter > > ----------------------------------------------------------------------------------------------- > > Title: Developments in Exclusive b->s l+l- Decays > > Abstract: > I will review recent developments in theory predictions for, measurements of and constraints on new physics from exclusive b -> s l+l- decays. Special attention will be applied to the largest sources of uncertainties: hadronic form factors, and impact of broad charmonium resonances on the decay spectra. > _______________________________________________ > Nikhef-theory-seminar mailing list > Nikhef-theory-seminar(a)nikhef.nl > https://mailman.nikhef.nl/mailman/listinfo/nikhef-theory-seminar

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[Bfys-physics] Bfys Meeting Tuesday 4 November at 14:00 in H331 and Vidyo
by Tjeerd Ketel 04 Nov '14

04 Nov '14

Dear colleagues, Bfys Meeting Tuesday 4 November at 14:00 in H331 and Vidyo 14:00 - 14:50 Rehearsal for Lunteren by Vasilis Syropoulos "Measurement of the weak phase phi_s in B_s -> J/psi phi decays with the LHCb detector" 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 at http://agenda.nikhef.nl/conferenceDisplay.py?confId=2963 Uploaded with login lhcb and so on. Best regards, Tjeerd

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[Bfys-physics] LHCB-PAPER-2014-061-001-COMMENT-011 (a comment has been made on your comment) (fwd)
by Niels Tuning 03 Nov '14

03 Nov '14

Dear Jeroen, Patrick, al, The replies to our comments on the Xib paper can be found here: http://cds.cern.ch/record/1966574 Cheers, Niels ---------- Forwarded message ---------- Date: Mon, 3 Nov 2014 10:48:47 +0100 From: CERN Document Server Submission Engine <cds.support(a)cern.ch> To: h71(a)nikhef.nl Subject: LHCB-PAPER-2014-061-001-COMMENT-011 (a comment has been made on your comment) Dear LHCb Colleague, The comment (LHCB-PAPER-2014-061-001-COMMENT-006) that you made on LHCB-PAPER-2014-061-001 (entitled: 'Observation of two new $\Xi_b^-$ baryon resonances') has itself been commented on by Matthew John Charles [CERN - PH/ULB] (matthew.john.charles(a)cern.ch). This new comment (LHCB-PAPER-2014-061-001-COMMENT-011) may be seen at http://cds.cern.ch/record/1966574 Best regards, The CERN Document Server Server support Team

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[Bfys-physics] Jacco's rehearsal talk
by Tjeerd Ketel 31 Oct '14

31 Oct '14

Dear all, I changed the protection of the slides of the rehearsal talk. They can only be read with the lhcb password. Dear Jacco, Some comments: Slide 3 The background illustration is nice enough to have it explained in full colour in the beginning. Explain the time scale with the region that CP violation starts and the present time where we see matter domination. After that you can overlay your text (in white). Slide 6 Cover the x and y axis partly where you have text about the experiments, if you want to avoid a possible misunderstanding that Suvayu suggested. Slide 10 You said PID of muons is done in the RICH, which is not correct. Slide 11 The number of stars suggests a low efficiency in the muon chambers. "Frequent change" of polarity suggests many reversals. "Regular change" does not suggest this. "Once a week" is a better approximation. Slide 15 Make the LHCb result on alpha^s_sl in red, and write "consistent with both D0mumu and SM" in red too. Slide 16 Put the expected result either on D0mumu, LHCb or the SM values. A nice presentation!! Tjeerd

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[Bfys-physics] LHCB-PAPER-2014-061-001-COMMENT-006: Comment Received (fwd)
by Niels Tuning 29 Oct '14

29 Oct '14

Dear all, Our comments have been submitted to cds. Cheers, Niels -- ---------- Forwarded message ---------- Date: Wed, 29 Oct 2014 11:48:23 +0100 From: CERN Document Server Submission Engine <cds.support(a)cern.ch> To: h71(a)nikhef.nl Subject: LHCB-PAPER-2014-061-001-COMMENT-006: Comment Received Dear LHCb Colleague, Your comment: document LHCB-PAPER-2014-061-001-COMMENT-006 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/1958238 It may also be viewed from the link 'View the N comments' of the document LHCB-PAPER-2014-061-001-COMMENT-006 (entitled: 'Observation of two new $\Xi_b^-$ baryon resonances'). If you detect an error please let us know by sending an email to cds.support(a)cern.ch. Thank you for your comments.

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[Bfys-physics] Xib paper
by Patrick Koppenburg 28 Oct '14

28 Oct '14

Dear all, I will not be able to attend the bfys meeting on Friday. Here's my input for the paper, which I find generally nicely written. General: We find your treatment of the resolution confusing. In L.98 you say you fix to the simulation (implying the simulation is OK, but not saying so). In line 122 you imply this should be scaled by a factor 1.1. Why is that not the default fit then? Title: why is Xib upright here and nowhere else? L.2: The Xib stats... (bsd). It took some time to understand what you mean. As the sentence is written it sounds like bsu and bds are an isodoublet each. Suggest to rewrite as "isodoublets composed of a Xibz (bsu) and a Xibm (bsd) state. L.6-7: here it sounds like the state is excited in the system. Re-order. L.23-25: The mass difference _is_ the isospin splitting? L.25: isposin? L.70: nearest -> any (means the same but is clearer) L.107: uncertainty -> resolution L.109-111: N/sigma_N is always smaller than the significance and is not a simple metric for it. We suggest to remove this sentence and just add ", with significance in excess of 10sigma" to the previous one. L.124: how do you remove multiple candidates? Randomly? L.126: what do you do with the fit to the wrong sign sample? L.174: move "at LHCb" to the end and change to "in the LHCb acceptance", or more generally "at the LHC in the forward acceptance" Supplementary material: why don't you add cos\theta_h plots? Cheers, Patrick -- ======================================================================== Patrick Koppenburg LHCb Physics Coordinator Nikhef, Amsterdam & CERN http://www.koppenburg.org/address.html

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