bfys-physics August 2016

bfys-physics@nikhef.nl

3 participants
6 discussions

[Bfys-physics] Fwd: First circulation of publication draft for PAPER-2016-030, Probing matter-antimatter asymmetries in $\Lambda^0_b$-baryon decays
by Patrick Koppenburg 30 Jan '17

30 Jan '17

Dear all, There's an important paper for us: The first evidence of CP violation in baryons. It would also be our 2nd paper going to Nature Physics. Anyone volunteering to collect comments? Thanks Patrick -------- Forwarded Message -------- Subject: First circulation of publication draft for PAPER-2016-030, Probing matter-antimatter asymmetries in $\Lambda^0_b$-baryon decays Date: Mon, 18 Jul 2016 15:32:41 +0200 From: Michael Schmelling <Michael.Schmelling(a)mpi-hd.mpg.de> To: LHCb General mailing list <lhcb-general(a)cern.ch> Dear Colleagues, A draft paper is available for your comments: Team leaders, please verify the author list and check for reading obligations of your group! Note that in view of ICHEP the circulation has been shortened from 2 weeks to 10 working days. Title : Probing matter-antimatter asymmetries in $\Lambda^0_b$-baryon decays Journal : Nature Physics Contact authors : Jinlin_Fu, Nicola_Neri, Maurizio_Martinelli, Andrea_Merli Reviewers : Steve_Playfer (chair), Mike_Sokoloff EB reviewer : Mat_Charles EB readers : Michael_Schmelling, Simon_Eidelman Analysis note : ANA-2014-077 Deadline : 29-Jul-2016 e-group : lhcb-paper-2016-030-reviewers Link : https://cds.cern.ch/record/2199884 Authors : LHCb Twiki : https://twiki.cern.ch/twiki/bin/viewauth/LHCbPhysics/LambdabTophhh The following institutes are requested to make institutional comments: NIKHEF__Amsterdam__The_Netherlands Edinburgh__United_Kingdom UFRJ__Rio_de_Janeiro__Brazil Bucharest-Magurele__Romania Padova__Italy PNPI__Gatchina__Russia Please send any comments via the CDS system. It is the responsibility of the contact authors to provide replies to all comments made. Subsequent modifications to the draft will be 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, when final decisions will be made. As the last step, the collaboration will be given a final opportunity to comment during a “silent approval” period. 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… Best regards, Michael -- Michael Schmelling, MPI for Nuclear Physics Phone:+49-6221-516-511 Fax:+49-6221-516-603

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[Bfys-physics] Fwd: Second circulation of publication draft for PAPER-2016-030, Probing matter-antimatter asymmetries in beauty baryon decays
by Patrick Koppenburg 29 Aug '16

29 Aug '16

Hi all, The 2nd circulation of the Lb->phhh paper has just started. We had many comments to make it more appropriate for Nature Physics, so a 2nd look is needed. Cheers, Patrick -------- Forwarded Message -------- Subject: Second circulation of publication draft for PAPER-2016-030, Probing matter-antimatter asymmetries in beauty baryon decays Date: Mon, 29 Aug 2016 12:50:22 +0200 From: Michael Schmelling <Michael.Schmelling(a)mpi-hd.mpg.de> To: LHCb General mailing list <lhcb-general(a)cern.ch> CC: lhcb-paper-2016-030-reviewers(a)cern.ch Dear Colleagues, The draft paper below is now in its second circulation to the collaboration. The main purpose is to give the collaboration the opportunity to view the paper after the changes to the first draft. Comments can be made on new features introduced or places where comments received in the first round are felt to be taken insufficiently into account. Title : Probing matter-antimatter asymmetries in beauty baryon decays Journal : Nature Physics Contact authors : Jinlin_Fu, Nicola_Neri, Maurizio_Martinelli, Andrea_Merli Reviewers : Steve_Playfer (chair), Mike_Sokoloff EB reviewer : Mat_Charles EB readers : Michael_Schmelling, Simon_Eidelman Analysis note : ANA-2014-077 Deadline : 5-Sep-2016 e-group : lhcb-paper-2016-030-reviewers Link : https://cds.cern.ch/record/2211017 Authors : LHCb Twiki : https://twiki.cern.ch/twiki/bin/viewauth/LHCbPhysics/LambdabTophhh Please send any comments via the CDS system. It is the responsibility of the contact authors to provide replies to all comments made. Shortly after the deadline, there will be a final meeting of the editorial board, with contact authors and reviewers present, when final decisions will be made. As the last step the collaboration will be given an opportunity to make any final comments during a short “silent approval” period, after which the paper will be submitted 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… Best regards, Michael -- Michael Schmelling, MPI for Nuclear Physics Phone:+49-6221-516-511 Fax:+49-6221-516-603

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[Bfys-physics] Fwd: [Theory-wide] Presentation
by Robert Fleischer 24 Aug '16

24 Aug '16

FYI Begin forwarded message: > From: Ruben Jaarsma <rjaarsma(a)nikhef.nl> > Subject: Re: [Theory-wide] Presentation > Date: 24 Aug 2016 08:10:31 GMT+2 > To: "theory-wide(a)nikhef.nl" <theory-wide(a)nikhef.nl> > > Dear all, > > Just a reminder for my master thesis presentation, this morning at 10:00 in H320. > > Kind regards, > > Ruben Jaarsma > > Van: Ruben Jaarsma > Verzonden: vrijdag 19 augustus 2016 11:37 > Aan: theory-wide(a)nikhef.nl > Onderwerp: [Theory-wide] Presentation > > Dear all, > > On Wednesday at 10:00 a.m. I will give a presentation about my master research project. You’re all invited to attend, details are given below. > > Kind regards, > > Ruben Jaarsma > > ----------------------------------------------------------------------------------------------------------- > Date: August 24, 2016 > Time: 10:00 a.m. > Location: H320 > > Speaker: Ruben Jaarsma > Title: New Strategy to Extract the CP-violating Phase phi_s from Bs -> K-K+ > Abstract: > The Bd -> pi-pi+, Bs -> K-K+ system allows the extraction of the angle gamma of the unitarity > triangle and the Bs—Bs-bar mixing phase phi_s. The LHCb collaboration presented first results with a precision at the 7 degree level. Unless there is theoretical progress, it is challenging to reduce this uncertainty below O(5 deg) due to U-spin breaking corrections. A new strategy for the optimal determination of phi_s is proposed. New elements are the semileptonic decays Bd -> pi-l+nu and Bs -> K-l+nu. Moreover, the U-spin symmetry is only applied to theoretically favourable quantities. Corrections from U-spin breaking are determined. A theoretical precision of up to 0.5 degree is possible in the era of Belle II and the LHCb upgrade. As Bs->K-K+ is dominated by penguin topologies, comparison with the SM expectation and alternative determinations such as from Bs -> J/psi phi may reveal new sources of CP violation. > > _______________________________________________ > Theory-wide mailing list > Theory-wide(a)nikhef.nl > https://mailman.nikhef.nl/mailman/listinfo/theory-wide

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[Bfys-physics] Fwd: LHCB-PAPER-2016-030-001-COMMENT-019 (a comment has been made on your comment)
by Patrick Koppenburg 05 Aug '16

05 Aug '16

Hi all, Here are the replies from the Lambda_b proponents. They addressed our comments. We also had one physics comment: > Physics: We are very surprised that the observation of P asymmetry in > Lb->Lcpi is only reported in the supplementary material. There has > never been P violation seen in Lb decays. Why not report it? Adding a > systematic uncertainty would take a bit of work, but is it that much? > > ---> For this paper we decided to focus on a couple of decay > channels which are the most interesting for CPV. In the coming months, > we will finalise the work on the other phhh decays. There we could > also add the observation of P asymmetry in Lb->Lcpi decays. > Generally it's fine that one comes back to that in a later publication, though I doubt it will be a "few" months. The risk that some theorist makes big claims is rather low in that case (P violation in weak baryon decays, so what? That was already seen in 1956). So I suggest not to follow up. Cheers, Patrick -------- Forwarded Message -------- Subject: LHCB-PAPER-2016-030-001-COMMENT-019 (a comment has been made on your comment) Date: Fri, 5 Aug 2016 13:15:22 +0200 From: CERN Document Server Submission Engine <cds.support(a)cern.ch> To: patrick.koppenburg(a)cern.ch Dear LHCb Colleague, The comment (LHCB-PAPER-2016-030-001-COMMENT-010) that you made on LHCB-PAPER-2016-030-001 (entitled: 'Probing matter-antimatter asymmetries in $\Lambda^0_b$-baryon decays') has itself been commented on by Maurizio Martinelli [CERN - EP/ULB] (maurizio.martinelli(a)cern.ch). This new comment (LHCB-PAPER-2016-030-001-COMMENT-019) may be seen at http://cds.cern.ch/record/2205729 Best regards, The CERN Document Server Server support Team -- ======================================================================== Patrick Koppenburg Nikhef, Amsterdam http://www.koppenburg.org/address.html

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[Bfys-physics] Fwd: Analysis approvals tomorrow (August 2)
by Patrick Koppenburg 02 Aug '16

02 Aug '16

Dear all, [Sorry for the potentially double post. mailman is playing games ] Today at 11 is Katya's approval presentation. Please join. Patrick -------- Forwarded Message -------- Subject: Analysis approvals tomorrow (August 2) Date: Mon, 1 Aug 2016 09:53:08 +0200 From: Vincenzo Vagnoni <vincenzo.vagnoni(a)cern.ch> To: lhcb-general (LHCb General mailing list) <lhcb-general(a)cern.ch> Dear colleagues, we will have one approval to go to PAPER tomorrow at 11:00 CERN time in room 2-R-030. Please see below for the details and note the reading Institute assignments. Details for connecting via vidyo are on the Indico agenda. Cheers, Vincenzo https://indico.cern.ch/event/560739/ * Tuesday, 2 August 2016 o 11:00 → 11:45 Approval to go to PAPER: First observation of B+→J/ψ3π+2π− and B+→ψ(2S)π+π+π− decays Twiki: https://twiki.cern.ch/twiki/bin/view/LHCbPhysics/B2psi5pi Institutes: Warwick, United Kingdom. Bristol, United Kingdom. Milano Bicocca, Italy. Cambridge, United Kingdom. Barcelona, Spain. LAPP, Annecy-Le-Vieux, France + 11:00 RC report5m Speakers: Peter Clarke (University of Edinburgh (GB)) , Ricardo Vazquez Gomez (Istituto Nazionale Fisica Nucleare (IT)) + 11:05 Analysis presentation20m Speakers: Katya Govorkova (Nikhef National institute for subatomic physics (NL)) , Vanya Belyaev (Institute for Theoretical and Experimental Physics (RU)) ======================================================= Vincenzo Vagnoni -- European Organisation for Nuclear Research (CERN) Address: EP/LBD 2-1-043, CH-1211 Geneva 23 - Switzerland Phone: +41-(0)22-76-73994 Mobile: +41-75-411-7920 (int. 167920) E-mail: Vincenzo.Vagnoni(a)cern.ch <mailto:Vincenzo.Vagnoni@cern.ch> -- Istituto Nazionale di Fisica Nucleare (INFN), Sezione di Bologna Address: via Irnerio 46, I-40126 Bologna - Italy Phone: +39-051-20-91071 Mobile: +39-347-6056920 E-mail: Vincenzo.Vagnoni(a)bo.infn.it <mailto:Vincenzo.Vagnoni@bo.infn.it> ======================================================= -- ======================================================================== Patrick Koppenburg Nikhef, Amsterdam http://www.koppenburg.org/address.html

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[Bfys-physics] Re : Fwd: First circulation of publication draft for PAPER-2016-030, Probing matter-antimatter asymmetries in $\Lambda^0_b$-baryon decays
by patrick koppenburg 02 Aug '16

02 Aug '16

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bfys-physics August 2016