bfys-physics October 2014

bfys-physics@nikhef.nl

7 participants
8 discussions

[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] 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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[Bfys-physics] PAPER-2014-061 for Nikhef
by Tjeerd Ketel 24 Oct '14

24 Oct '14

Dear all, As Patrick mentioned an interesting paper for us. I suggest to discuss it Friday morning 24 October, if we can find a volunteer to introduce it. Please, let me know. Best regards, Tjeerd ---------- Forwarded message ---------- Date: Thu, 16 Oct 2014 16:27:34 +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-2014-061, Observation of two new $\Xi_b^-$ baryon resonances Dear Colleagues, A paper is available for your comments: Title : Observation of two new $\Xi_b^-$ baryon resonances Journal : PRL Contact authors : Mat Charles, Steven Blusk Reviewers : Marco Pappagallo (chair), Mark Williams EB reviewer : George Lafferty EB readers : Diego Tonelli, Hassan Jawahery Analysis note : ANA-2014-067 Deadline : 30-Oct-2014 e-group : lhcb-paper-2014-061-reviewers Link : https://cds.cern.ch/record/1955572 Authors : LHCb Twiki : https://twiki.cern.ch/twiki/bin/view/LHCbPhysics/XibStarMinus2XibZero The following institutes are requested to make institutional comments: NIKHEF VU, Netherlands Ferrara, Italy STFC (RAL), United Kingdom IHEP, Protvino, Russia Bucharest-Magurele, Romania Milano-Bicocca, Italy 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 reviewers 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] Fwd: First circulation of publication draft for PAPER-2014-061, Observation of two new $\Xi_b^-$ baryon resonances
by Patrick Koppenburg 16 Oct '14

16 Oct '14

Dear all, An interesting paper for Nikhef: Two new particles and a conspiracy theory! Cheers, Patrick -------- Original Message -------- Subject: First circulation of publication draft for PAPER-2014-061, Observation of two new $\Xi_b^-$ baryon resonances Date: Thu, 16 Oct 2014 18:27:34 +0200 From: Rolf Oldeman <rudolf.oldeman(a)cern.ch> To: lhcb-general (LHCb General mailing list) <lhcb-general(a)cern.ch> Dear Colleagues, A paper is available for your comments: Title : Observation of two new $\Xi_b^-$ baryon resonances Journal : PRL Contact authors : Mat Charles, Steven Blusk Reviewers : Marco Pappagallo (chair), Mark Williams EB reviewer : George Lafferty EB readers : Diego Tonelli, Hassan Jawahery Analysis note : ANA-2014-067 Deadline : 30-Oct-2014 e-group : lhcb-paper-2014-061-reviewers Link : https://cds.cern.ch/record/1955572 Authors : LHCb Twiki : https://twiki.cern.ch/twiki/bin/view/LHCbPhysics/XibStarMinus2XibZero The following institutes are requested to make institutional comments: NIKHEF VU, Netherlands Ferrara, Italy STFC (RAL), United Kingdom IHEP, Protvino, Russia Bucharest-Magurele, Romania Milano-Bicocca, Italy 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 reviewers 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, Rolf Oldeman

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[Bfys-physics] CPT in neutral meson systems
by Suvayu Ali 08 Oct '14

08 Oct '14

Hello all, I thought this maybe of interest to ppl: <http://arxiv.org/abs/1409.5998>. Cheers, -- Suvayu Open source is the future. It sets us free.

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[Bfys-physics] Nikhef open day 2014
by Jacco de Vries 05 Oct '14

05 Oct '14

Dear collegues, This year, the Nikhef open day will take place on Saturday 4 October. If you would like to participate in the adventure of explaining b-physics, detector related items, or any science question / personal theory that the general audience may come up with, please let me know! I will send Surya a list of names of people that would like a genuine Nikhef T-shirt, name tag and lunch. (i.e. Going or Going part-time/maybe) So far I registered the following: Going: - Laurent, Greg, Veerle, Maarten, Roel, Mick Going part-time / maybe: - Pieter, Wouter, Jeroen v.T., Siim, Niels Not going: - Elise, Jeroen v.L., Lennaert Please let me know if you want on this list! Nikhef will open up to the public at 12:00, but being there a bit before that to help set things up is always appreciated. Also, if you have any refreshing ideas, they are more than welcome. We will try to run the masterclass on the full screen this year, as well as get some new (upgrade) posters designed. In addition, we hope to rely on the support from last year (OT module / Calo crystal / LHCb maquette / LHCb movie / old posters / etc.) Thanks, Jacco

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bfys-physics October 2014