bfys-physics

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520 discussions

[Bfys-physics] Lunteren rehearsals (1 November 2016)
by Patrick Koppenburg 31 Oct '16

31 Oct '16

Dear all, Tomorrow afternoon we have three rehearsals for Lunteren. https://indico.nikhef.nl/conferenceDisplay.py?confId=529 Please join Patrick -- ======================================================================== Patrick Koppenburg Nikhef, Amsterdam http://www.koppenburg.org/address.html

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[Bfys-physics] Fwd: First circulation of publication draft for PAPER-2016-049, Observation of the rare baryonic decay $\Lambda^0_b \to p \pi^- \mu^+ \mu^-$
by Patrick Koppenburg 18 Oct '16

18 Oct '16

Dear all, A new paper is assigned to us. As this is the non-resonant part of my J/psippi paper I assign it to myself and will briefly present it at the bfys meeting on 28/10. Please read it and let me know your comments. Cheers, Patrick -------- Forwarded Message -------- Subject: First circulation of publication draft for PAPER-2016-049, Observation of the rare baryonic decay $\Lambda^0_b \to p \pi^- \mu^+ \mu^-$ Date: Tue, 18 Oct 2016 10:02:35 +0200 From: Michael Schmelling <Michael.Schmelling(a)mpi-hd.mpg.de> To: LHCb General mailing list <lhcb-general(a)cern.ch> CC: LHCb-PAPER-2016-049-reviewers(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! Title : Observation of the rare baryonic decay $\Lambda^0_b \to p \pi^- \mu^+ \mu^-$ Journal : JHEP Contact authors : Eluned_Anne_Smith, Patrick_Owen, Mitesh_Patel Reviewers : Lars_Eklund (chair), Harry_Cliff EB reviewer : Simon_Eidelman EB readers : Alberto_Correa_Dos_Reis, Michael_Schmelling Analysis note : ANA-2015-068 Deadline : 1-Nov-2016 e-group : lhcb-paper-2016-049-reviewers Link : https://cds.cern.ch/record/2225855 Authors : LHCb Twiki : https://twiki.cern.ch/twiki/bin/view/LHCbPhysics/LbToPPiMuMu The following institutes are requested to make institutional comments: CERN__Switzerland EPFL__Lausanne__Switzerland Santiago_de_Compostela__Spain TU_Dortmund__Germany NIKHEF__Amsterdam__The_Netherlands Oxford__United_Kingdom 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] Cake
by Robert Fleischer 26 Sep '16

26 Sep '16

Dear Colleagues, since today is my birthday there will be cake after lunch at *** 13:00 *** in H321a. I hope to see you there! With best regards, Robert

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[Bfys-physics] cake at the coffee
by Jeroen Van Tilburg 19 Sep '16

19 Sep '16

Hi, For a special occasion I have brought cake at the coffee (which is now). Groeten Jeroen

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[Bfys-physics] Bs->tau tau CONF note
by Patrick Koppenburg 14 Sep '16

14 Sep '16

Hi all, I noted we also have the Bs->tau tau CONF (Kristof et al) assigned to the VU. I read it on the plane and have a plethora of comments. The deadline is tomorrow. Is anyone assigned to this note? Is anyone else reading it? Thanks for letting me know asap. If not I'll submit tomorrow. Thanks Patrick //====================================================== Dear Kristof, Justine, Congratulations for this impressive amount of work. I have a few comments on the CONF. I use the same level of pedantry as I would for a paper, as most of it can be recycled when we reach that stage. Physics / General: - Values: From the Brazil plots I read 0.003 and 0.0013 at 95 CL. In the abstract and body you give a value that is 10 times smaller for the Bd. That cannot be as there is a factor 4 between alpha and alpha_s. What's up? - I have troubles with the concept of "all of nothing". In the abstract you write you see no signal and then set limits depending if "all events" come from Bs or Bd. We know already they do not. Rephrase here and in the body as "signal (fully) dominated by Bs decays", or similar. You should also help the reader understanding where this assumption comes from: just point to the factor 30 in SM BFs, to be multiplied by fd/fs. - That makes me think: The overall rates ratio in the SM is only 8 or so. Assuming SM-like flavour structure you could set a limit on both BFs. Probably for the paper... - L.41: I hope this is a typo and that you use D+>K-pi+pi+ and not the DCS mode you mention here. It is right in Eq. (3) (but call it K-pi+pi+, please). - L.98: I fail to understand what you mean with no NN requirement. And which of the two NN do you mean? - L.172: "are dependent" is too vague. Can you give the reader a feeling for how much it affects the limits? ... around there you should also compare the limit for the Bd with that of Babar. Line-by-line: Title page: Isn't Kristof's name De Bruyn? Abstract: No signal is observed. L.5: why strong? It's 3.0sigma L.13: Belle result of Ref. [9] (as you include other Belle results) L.16: B0->K*0mumu L.19: Use the cite package to get [12-14] L.30: add some space between = and 7 L.31: reconstructable -> ible L.32: discriminating against what? It certainly is against Z->tautau L.35: all the observed decays are assumed to originate from a Bs meson L.80: in Ref. [31]. Refer to the appendix here (unless that goes to additional material) L.93: \tau L.104: most of the signal decays fall L.105: remove one. What are these 10000 events? Data, simulation? It's not clear at all. L.106: global replace : number of signal events -> signal yield Eq.1: SR, CR, data and sim in roman (also in figure captions). L.118: \bquark-hadron L.122: Gaussian L.124: remove one. L.133: background-only Fig.2: y axis: fraction of decays (up), candidates (down). x axis: use similar size fonts for title and labels. You could put the two plots next to each other to save space and avoid plots being fara away from where mentioned. Fig.3: spell out relative. Why "subregion" wasn't it called region before? L.15); the dominant one -> dominant L.154: deviation of what? You mean the fitted signal yield I presume. L.155: error -> uncertainty L.159: how can you add an uncertainty in quadrature with the statistics of the simulated sample. Say what you mean exactly (and do not use the statistics jargon). L.163: signal yield L.166: the general comment applied also here. L.167: the one -> that L.176: \tau. remove thus. Fig.4: it is possible to show negative yields, we have done so in the past. Fig.6 and 11: add some space between label and title of x axis. [6] collaboration [14] remove no. 7 [27] strange placement of comma [31] why period after Universit\'e? [34] D. Mart{\'\i}nez Santos [40] Strange format The overall quality of the English is lower in App. A. Is that to be included in the note? It seems not to be referred to from anywhere. L.285: lose (?) L.292: ... and the Z boson being produced at the PV. (it would not work at LEP) L.295: 4-vector conservation is implied. No need to mention all that. L.302: not clear what former and latter refer to. Eq.4: period missing L.310: only instance of we L.320: I believe that it is highly non-trivial, but rather than you showing off I'd prefer knowing how you do it. L.327: the ones -> those L.331: much more -> only L.333: remove ones. Are App B and C additional material? L.345 and 351: use boldmath L.348: $Z$ (?) Fig.7: Events -> Candidates L.352: The NN output distributions for simulated B->tautau decays in the ... Fig.~9. The general comment also applies here. Fig. 9: Fraction of decays Fig. 10: Candidates Cheers, Patrick -- ======================================================================== Patrick Koppenburg Nikhef, Amsterdam http://www.koppenburg.org/address.html

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[Bfys-physics] Fwd: Conference report circulation: CONF-2016-012, Updated search for the decay $K^0_{\rm S} \to \mu^+\mu^-$
by Patrick Koppenburg 09 Sep '16

09 Sep '16

Hi all, Reviews always come in pairs. Here's a CONF with deadline on 12 September. Cheers, Patrick -------- Forwarded Message -------- Subject: Conference report circulation: CONF-2016-012, Updated search for the decay $K^0_{\rm S} \to \mu^+\mu^-$ Date: Tue, 6 Sep 2016 23:36:34 +0200 From: Michael Schmelling <Michael.Schmelling(a)mpi-hd.mpg.de> To: LHCb General mailing list <lhcb-general(a)cern.ch> CC: lhcb-conf-2016-012-reviewers <lhcb-conf-2016-012-reviewers(a)cern.ch> Dear colleagues, A conference report is available for your comments: Team leaders, please check the reading responsibilities of your institute. Title: Updated search for the decay $K^0_{\rm S} \to \mu^+\mu^-$ Contact authors: Giacomo_Graziani, Jessica_Prisciandaro Reviewers: Xuhao_Yuan (chair), Patrizia_De_Simone, Brian_Meadows (EB) Analysis note: ANA-2016-053 Deadline: 12-Sep-2016 e-group: lhcb-conf-2016-012-reviewers Link: https://cds.cern.ch/record/2213607 Twiki: https://twiki.cern.ch/twiki/bin/viewauth/LHCbPhysics/KsToMuMu2012 Institutes requested to submit comments on the report: Oxford__United_Kingdom NIKHEF__Amsterdam__The_Netherlands UFRJ__Rio_de_Janeiro__Brazil LAPP__Annecy-Le-Vieux__France After the deadline, the reviewers are charged with approving the report for public release, once they are satisfied that all comments have been taken into account. You can find all reports 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: First circulation of publication draft for PAPER-2016-043, Search for the very rare decays of beauty mesons into four muons
by Patrick Koppenburg 02 Sep '16

02 Sep '16

Hi all, Another one for us. B -> 4 muons! Cheers, Patrick -------- Forwarded Message -------- Subject: First circulation of publication draft for PAPER-2016-043, Search for the very rare decays of beauty mesons into four muons Date: Fri, 2 Sep 2016 11:54:20 +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! Title : Search for the very rare decays of beauty mesons into four muons Journal : JHEP Contact authors : Alexander_Baranov, Tobias_Tekampe Reviewers : Benoit_Viaud (chair), Antonio_Romero_Vidal EB reviewer : Alberto_Correa_Dos_Reis EB readers : Nicola_Serra, Michael_Schmelling Analysis note : ANA-2015-040 Deadline : 16-Sep-2016 e-group : lhcb-paper-2016-043-reviewers Link : https://cds.cern.ch/record/2212531 Authors : LHCb Alexander Baranov Twiki : https://twiki.cern.ch/twiki/bin/viewauth/LHCbPhysics/B24Mu The following institutes are requested to make institutional comments: Liverpool__United_Kingdom NIKHEF__Amsterdam__The_Netherlands Manchester__United_Kingdom IHEP__Protvino__Russia Bologna__Italy Imperial_College_London__United_Kingdom 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] 2nd circulation of Lb paper
by Patrick Koppenburg 02 Sep '16

02 Sep '16

Hi all, The Lambdab->p3pi paper is in 2nd circulation until Monday. Here are my comments. I'll submit them on Monday but am happy to insert any additional comment. Cheers, Patrick --- Dear Jinlin, Nicola, Maurizio, Andrea, The paper is much improved wrt the 1st circulation and better suited for a non HEP audience. Here are a few more comments L.11: (quark content $bud$) [ It may not be obvious that these are quarks) L.13: non-negligible -> sizeable [ negligible is always wrt to something ] L.25: This repeats L.6 Fig.1: The diagrams could be improved, but we believe Nature will do that anyway. L.40: No colons before equations L.81: events -> $pp$ collisions events [ This is HEP jargon. You give several different meanings to event, see below. Here it's the correct use https://en.wikipedia.org/wiki/Event_%28particle_physics%29, but being precise does not harm.] L.93: events -> decays Fig.2: extract -> determine L.145: make this a full paragraph break. L.257 and 259: Use -- for ranges. --- -- ======================================================================== Patrick Koppenburg Nikhef, Amsterdam http://www.koppenburg.org/address.html

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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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