bfys-physics

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[Bfys-physics] Fwd: First circulation of publication draft for PAPER-2018-025, Search for $C\!P$ violation in $\Lambda^0_b o pK^-$ and $\Lambda^0_b o p\pi^-$ decays
by Patrick Koppenburg 25 May '18

25 May '18

Dear all, We have a new paper assigned to us. Sean kindly agreed to collect our comments. Please note the circulation deadline is 26/5. Cheers, Patrick -------- Forwarded Message -------- Subject: First circulation of publication draft for PAPER-2018-025, Search for $C\!P$ violation in $\Lambda^0_b o pK^-$ and $\Lambda^0_b o p\pi^-$ decays Date: Wed, 16 May 2018 18:28:57 +0200 From: Patrick Koppenburg <patrick.koppenburg(a)cern.ch> To: LHCb General mailing list <lhcb-general(a)cern.ch> CC: LHCb-PAPER-2018-025-reviewers(a)cern.ch Dear Colleagues, A draft paper is available for your comments. Note that due to conference deadlines this draft is on a slightly accelerated schedule. Team leaders, verify the author list and check for reading obligations. The following institutes are requested to make institutional comments via the CDS link given below: NIKHEF, Amsterdam, The Netherlands Edinburgh, United Kingdom Roma La Sapienza, Roma, Italy Yandex School of Data Analysis, Moscow, Russia CBPF, Rio de Janeiro, Brazil Santiago de Compostela, Spain Title : Search for $C\!P$ violation in $\Lambda^0_b o pK^-$ and $\Lambda^0_b o p\pi^-$ decays Journal : PLB Contact authors : Fabio Ferrari, Stefano Perazzini Reviewers : Irina Nasteva (chair), Shanzhen Chen EB reviewer : Alberto Correa dos Reis EB readers : Franco Bedeschi, Mike Williams Analysis note : ANA-2018-002 Deadline : 26-May-2018 e-group : lhcb-paper-2018-025-reviewers CDS link :https://cds.cern.ch/record/2318506 Authors : LHCb Twiki :https://twiki.cern.ch/twiki/bin/view/LHCbPhysics/Lb2phCPV 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, Patrick -- ======================================================================== Patrick Koppenburg Nikhef, Amsterdam http://www.nikhef.nl/~pkoppenb/#contact

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[Bfys-physics] Fwd: First circulation of publication draft for PAPER-2018-019, Measurement of the lifetime of the doubly charmed baryon $\Xi_{cc}^{++}$
by Patrick Koppenburg 15 May '18

15 May '18

Dear all, We have a new paper assigned to us. The lifetime of the doubly charmed and doubly charged baryon, which helps addressing some issues between us and SELEX. Any volunteer to collect comments? Thanks Patrick -------- Forwarded Message -------- Subject: First circulation of publication draft for PAPER-2018-019, Measurement of the lifetime of the doubly charmed baryon $\Xi_{cc}^{++}$ Date: Thu, 3 May 2018 09:36:14 +0200 From: Patrick Koppenburg <patrick.koppenburg(a)cern.ch> To: LHCb General mailing list <lhcb-general(a)cern.ch> CC: LHCb-PAPER-2018-019-reviewers(a)cern.ch Dear Colleagues, A draft paper is available for your comments. Team leaders, verify the author list and check for reading obligations. The following institutes are requested to make institutional comments via the CDS link given below: Birmingham, United Kingdom Ruprecht-Karls-Universitaet Heidelberg, Germany NIKHEF VU, The Netherlands LAPP, Annecy-Le-Vieux, France UFRJ, Rio de Janeiro, Brazil Cincinnati, United States Title : Measurement of the lifetime of the doubly charmed baryon $\Xi_{cc}^{++}$ Journal : PRL Contact authors : Jibo He, Yuehong Xie, Yuanning Gao, Jiesheng Yu, Daniel Vieira Reviewers : Angelo Di Canto (chair), Steve Blusk EB reviewer : Stefania Vecchi EB readers : Roland Waldi, Roberta Santacesaria Analysis note : ANA-2017-032 Deadline : 17-May-2018 e-group : lhcb-paper-2018-019-reviewers CDS link : https://cds.cern.ch/record/2316030 Authors : LHCb Twiki : https://twiki.cern.ch/twiki/bin/view/LHCbPhysics/XiccLifetime 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, Patrick -- ======================================================================== Patrick Koppenburg Nikhef, Amsterdam http://www.nikhef.nl/~pkoppenb/#contact

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25 Apr '18

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[Bfys-physics] Zuoz summer school
by Patrick Koppenburg 16 Apr '18

16 Apr '18

Dear all, FYI: The Paul Scherrer Institute SPSI is organising a summer school on Flavour Anomalies in Zuoz (pronounced [tsuə̯ts]) in the Swiss Alps. https://www.psi.ch/particle-zuoz-school/ltp-zuoz-summer-school Cheers, Patrick -- ======================================================================== Patrick Koppenburg Nikhef, Amsterdam https://www.nikhef.nl/~pkoppenb/#contact

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Re: [Bfys-physics] [Bfys-group] AALLSAMEBPV problem
by Carlos Vázquez Sierra 10 Apr '18

10 Apr '18

Hi Niels, indeed the explanation is exactly as Laurent says. The effect of the bug in the n-body topological trigger lines is basically dropping prompt events with more than one PV (IPCHI2<16), which becomes worse as a function of n. If we wouldn't have the OR in the topo lines, the effect would be indeed catastrophic, but also probably detected already during 2015. For 2018 data-taking, the functor will be removed from the trigger lines. We'd probably do the same for the Stripping if the users agree. Cheers On 10/04/18 17:21, Laurent Dufour wrote: > Hi Niels, > > Indeed. 10% of the events are not saved. > > The effect would be much worse if the IP-OR was not there. For a calibration line for example, I do not have this OR in there. My difference is approximately 250% (I’m sensitive to combinatorics), for example. > > Cheers, > Laurent > >> On 10 Apr 2018, at 17:10, Niels Tuning <h71(a)nikhef.nl> wrote: >> >> >> >> Hi Carlos, >> >> Thanks for the info!! What a nightmare... >> >> I don't understand one thing from Olli's slides: he says that about 10% of the 3-body topo events are affected? What does he mean? >> That 10% of the events are not selected in the trigger? >> >> But you told me that the OR with a displacement requirement probably saves many events? >> (AALLSAMEBPV(-1, -1, -1) | (AMINCHILD(MIPCHI2DV(PRIMARY)) > 16) >> >> How can I reconcile these two statements? >> >> Cheers & thanks! Niels >> >> >> >> On Tue, 10 Apr 2018, Carlos Vázquez Sierra wrote: >> >>> Hi all, >>> >>> as you probably know there is a bug in one of the LoKi functors (only affecting Run-2 data & MC), namely AALLSAMEBPV. >>> Olli has presented today the topic at the Tuesday meeting: >>> >>> https://indico.cern.ch/event/715191/contributions/2960112/attachments/16301… >>> >>> In case you have worked in a Run-2 analysis, please check if you have used this functor explicitly in your selection. If yes, your results might be affected. >>> >>> Cheers >>> >>> -- >>> Carlos Vázquez Sierra >>> LHCb Collaboration >>> NIKHEF - National Institute for Subatomic Physics >>> https://phonebook.cern.ch/phonebook/#id=PE704221 + carlos.vazquez(a)cern.ch >>> >>> _______________________________________________ >>> Bfys-group mailing list >>> Bfys-group(a)nikhef.nl >>> https://mailman.nikhef.nl/mailman/listinfo/bfys-group >>> >> _______________________________________________ >> Bfys-group mailing list >> Bfys-group(a)nikhef.nl >> https://mailman.nikhef.nl/mailman/listinfo/bfys-group -- Carlos Vázquez Sierra LHCb Collaboration NIKHEF - National Institute for Subatomic Physics https://phonebook.cern.ch/phonebook/#id=PE704221 + carlos.vazquez(a)cern.ch

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[Bfys-physics] LHCb Nikhef (bfys) Meeting (16 March 2018)
by Patrick Koppenburg 16 Mar '18

16 Mar '18

Dear all, There seems to be some problems with the mailing lists. Ignore tis if you have seen it already. Tomorrow we have a bfys meeting at 10. Mick will speak about rare Lambda_b decays.Λ0b→Λe+e− https://indico.nikhef.nl/event/939/ There's no staff meeting. Cheers, Patrick -- ======================================================================== Patrick Koppenburg Nikhef, Amsterdam http://www.nikhef.nl/~pkoppenb/#contact

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[Bfys-physics] nog een test
by Marcel Merk 16 Mar '18

16 Mar '18

one more

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[Bfys-physics] test
by Elena Dall'Occo 16 Mar '18

16 Mar '18

Hi :D

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[Bfys-physics] Fwd: LHCB-PAPER-2018-005-001-COMMENT-014 (a comment has been made on your comment)
by Laurent Dufour 09 Mar '18

09 Mar '18

Hi everyone, We have received comments on our comments. Looking through it quickly, about the large physics points: it seems that they indeed optimise S/(S+B) on MC, which is their “expected”. They gather the TIS efficiency from Monte Carlo. I’m surprised by their very low error on the trigger efficiency in the first place (0.1%). I wonder how they assign a systematic to this TIS thing… In the light of the winter conference deadlines, it would be nice to get back to them as soon as possible. Please let me know if you have anything else to add. I’ll try to send an answer at the end of tomorrow, or on Saturday if requested. Good night, Laurent > Begin forwarded message: > > From: CERN Document Server Submission Engine <cds.support(a)cern.ch> > Subject: LHCB-PAPER-2018-005-001-COMMENT-014 (a comment has been made on your comment) > Date: 7 March 2018 at 18:30:02 GMT+1 > To: <laurent.dufour(a)cern.ch> > > Dear LHCb Colleague, > The comment (LHCB-PAPER-2018-005-001-COMMENT-007) that you made on LHCB-PAPER-2018-005-001 > (entitled: 'Observation of the decay $\Lambda^0_b \to \Lambda_c^+ p \bar{p} \pi^-$') has itself been commented on by Mengzhen Wang [CERN - EP/ULB] (mengzhen.wang(a)cern.ch). > > This new comment (LHCB-PAPER-2018-005-001-COMMENT-014) may be seen at > http://cds.cern.ch/record/2307522 > > > Best regards, > The CERN Document Server Server support Team

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[Bfys-physics] Watch your Vidyo!
by Mick Mulder 08 Mar '18

08 Mar '18

Dear all, Elena's talk @ the LHCb week is starting! After it is Carlos! Cheers, Mick

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