April 2026 - Cosmo-26-soc - mailing lists Lorentz

lunch meeting at THC May 8
by Marieke Postma 29 Apr '26

29 Apr '26

Hi, we can have a cosmo lunch-meeting again before the next THC meeting, which is at Nikhef next week. Who will join in person? Then I can order lunch. thanks, marieke

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Abstract submission status
by Matthieu Schaller 27 Apr '26

27 Apr '26

Dear all, One week from the deadline, we have received 102 abstracts (recall we have 160 slots without more parallel sessions). The breakdown is as follows (some abstrcts use multiple tracks): - CMB: 16 - DE/MG: 21 - DM: 27 - Early Universe: 27 - GW: 16 - Inflation: 21 - LSS: 29 - Stats/ML: 13 - nu's: 8 - PMF: 1 - Others: 14 Good balance overall apart from PMFs. We seem to have reached or interested that community. "Others" include: - cosmological tensions - EFT - weak-lensing - anisotropy - cluster cosmo - galaxy evolution - baryon feedback - Cosmic Topology - Numerical Relativity - "dS/CFT Correspondence; Analytical Continuation; Inner Product; PT Symmetry; Spontaneous Symmetry Breaking" - "Gravitational collapse, critical phenomena, universality, mass-less scalar field dynamics." Apart from the last two, they all ticked an additional track besides "others". Cheers, Matthieu -- ———————————————————————————————————— Dr Matthieu Schaller (University lecturer) Lorentz Institute & Leiden Observatory Office: HL 257 The Netherlands Phone: +31 (0)71-527-5522 ————————————————————————————————————

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Fwd: Cosmo-26: Session convenor instructions & Deadlines
by Matthieu Schaller 20 Apr '26

20 Apr '26

Dear SOC, FYI, in case you get questions, here are the instructions that have been sent to the convenors for their sessions. At the moment, we have 65 abstracts. Best, M. -------- Forwarded Message -------- Subject: Cosmo-26: Session convenor instructions & Deadlines Date: Mon, 20 Apr 2026 13:45:31 +0200 From: cosmo-26(a)lorentz.leidenuniv.nl CC: mschaller(a)lorentz.leidenuniv.nl, Ana Achucarro <achucar(a)lorentz.leidenuniv.nl> Dear colleagues, On behalf of the SOC, we thank you again for agreeing to be parallel session convenors for COSMO’26. We have set up your managerial rights for the abstract selection process on Indico. If you don’t already have a global indico <https://indico.global/>account, please create one at your earliest convenience and let us know so we can add you to the system. On the conference's Indico portal (https://indico.global/event/15863/) you should see a link to the reviewing area on the left, which will lead you to the abstracts already submitted to the track you are a convenor of. There you can see the submissions, grade them, leave comments, and suggest the talks to be moved to a different track (if needed). The deadline for abstract submission is the 30th of April, after which the process of abstract selection can commence but you are welcome to already take a head start. Each parallel session by default will have tentalks (two blocks of 1.5 hours consisting of five talks each), with some room for adjustment depending on demand. Keeping a more extended list beyond the 10 might be useful in case we expand specific topics; we have room to parallelise more. Note that you can also suggest talks to be converted to a poster presentation. Sessions typically have more than one convenor, we hope for coordinated decisions but we leave it entirely up to you. Please see below for the full convenor list and contact details. To ensure fairness for participants from all over the world (where some participants may require abstract acceptance for reimbursement from their home institutions), decisions about abstract selection will be communicated to the authors two weeks before the end of Early bird registration. For the convenors, this means a deadline of May 12 for final abstract selection. We hope this somewhat short timeline can be accommodated. As convenors, we encourage you to curate a range of talks that represents a span in terms of seniority, gender, geography, and of course, topic, for which we’re relying on your judgement. If you have any further questions about the logistics of convening, please don’t hesitate to ask. With warm cosmological regards, Matthieu Schaller (on behalf of the cosmo-26 SOC) ---------------------------- Convenors list and contact details: Primoridal Magnetic Fields: Kyrylo Bondarenko -kyrylo.bondarenko(a)gmail.com Oksana Iarygina -oksana.iarygina(a)su.se Large-scale Structure: Hendrik Hildebrandt -hendrik(a)astro.ruhr-uni-bochum.de Koen Kuijken -kuijken(a)strw.leidenuniv.nl Dark Matter: Pippa Cole -p.s.cole(a)qmul.ac.uk Bradley Kavanagh -kavanagh(a)ifca.unican.es Leszek Roszkowski -Leszek.Roszkowski(a)cern.ch Cosmic Microwave Background: William Coulton -william.coulton(a)gmail.com Adriaan Duivenvoorden -adriaand(a)mpa-garching.mpg.de Dark Energy / Modified Gravity: Carlos Garcia-Garcia -carlos.garcia-garcia(a)physics.ox.ac.uk Dražen Glavan -glavan(a)fzu.cz Inflation/primordial perturbations: Sebastian Cespedes -s.cespedes-castillo(a)imperial.ac.uk Pippa Cole -p.s.cole(a)qmul.ac.uk Dong-Gang Wang -dgw36(a)cam.ac.uk Early Universe: Bibhushan Shakya -bs475(a)cornell.edu Jorinde van de Vis -jorinde.van.de.vis(a)cern.ch Gravitational Waves: Alice Garoffolo -aligaro(a)sas.upenn.edu Ameek Malhotra -ameek.malhotra(a)swansea.ac.uk Neutrinos: Martina Gerbino -gerbinom(a)fe.infn.it Maksym Ovchynnikov -maksym.ovchynnikov(a)cern.ch Methods/ statistical inference / ML: Ellena Sellentin -sellentin(a)strw.leidenuniv.nl -- ———————————————————————————————————— Dr Matthieu Schaller (University lecturer) Lorentz Institute & Leiden Observatory Office: HL 257 The Netherlands Phone: +31 (0)71-527-5522 ————————————————————————————————————

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Fwd: Speaker Proposal: Hyper-Kamiokande Highlights [P(ysics & Detectors)
by Matthieu Schaller 20 Apr '26

20 Apr '26

FYI, this is what we replied to the Hyper-K request following the chat we had before THC in Leiden. -------- Forwarded Message -------- Subject: Re: Speaker Proposal: Hyper-Kamiokande Highlights [P(ysics & Detectors) Date: Fri, 17 Apr 2026 17:31:37 +0200 From: Matthieu Schaller <mschaller(a)lorentz.leidenuniv.nl> To: Mauricio Barbi <Mauricio.Barbi(a)uregina.ca> CC: Ana Achucarro <achucar(a)lorentz.leidenuniv.nl>, cosmo-26(a)lorentz.leidenuniv.nl Dear Prof Barbi, Our apologies for the slow reaction. Please go through the abstract submission process, decisions about the parallel sessions are up to the topic convenors, they will judge the relevance of the talks against all other submissions. We cannot guarantee selection of any one talk but there is the option to open extra parallel sessions in relevant topics for which there is enough interest. Please advise your speakers to emphasize the cosmological aspects, and to select the most appropriate (existing) parallel session together with the option "Others" and add the extra keyword "Hyper-K" . (Note that the payment deadline for participants is a few weeks after the talks and posters have been selected.) Let us know if you have any questions. Regards, Matthieu Schaller (on behalf of the Organizing Comm) On 15/04/2026 22:14, Mauricio Barbi wrote: > Dear organizers, > > I wonder whether you have received my previous email (see below). I > would greatly appreciate if you could get back to me as soon as > possible as the deadline for abstract submission is approaching and > the procedure to select Hyper-K speakers can take at least 1 week. > > Thank you, > Mauricio > > Mauricio Barbi > Professor > Department of Physics, University of Regina > 3737 Wascana Parkway > Regina, Saskatchewan > S4S0A2, Canada > Tel: +1-306 585-4260, Fax: +1-306 585-5659 > ------------------------------------------------------------------------ > *From:* Mauricio Barbi <Mauricio.Barbi(a)uregina.ca> > *Sent:* April 8, 2026 13:04 > *To:* cosmo-26(a)lorentz.leidenuniv.nl <cosmo-26(a)lorentz.leidenuniv.nl> > *Subject:* Speaker Proposal: Hyper-Kamiokande Highlights [P(ysics & > Detectors) > Dear Organizers, > > I am writing on behalf of the Hyper-K Speaker Board committee to > inquire about interest in featuring Hyper-K physics or detector > technology at your upcoming conference. > > We can provide qualified speakers to cover a range of topics — > including neutrino oscillations, supernova neutrinos, and proton decay > — in either plenary or parallel sessions. We are happy to tailor the > presentation to your conference’s specific themes. > > Please let us know if there is interest and what topics would be > preferred. > > Best regards, > Mauricio Barbi > Hyper-K Speaker Board > ------------------------------------------------------------------------ > > > > Mauricio Barbi > Professor > Department of Physics, University of Regina > 3737 Wascana Parkway > Regina, Saskatchewan > S4S0A2, Canada > Tel: +1-306 585-4260, Fax: +1-306 585-5659 -- ———————————————————————————————————— Dr Matthieu Schaller (University lecturer) Lorentz Institute & Leiden Observatory Office: HL 257 The Netherlands Phone: +31 (0)71-527-5522 ————————————————————————————————————

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(PLEASE FORWARD) REMINDER: COSMO-26 (Leiden, 24-28 Aug) -- registration now open
by Ana Achucarro 18 Apr '26

18 Apr '26

Dear friends, Could you please share this announcement within your institution and groups? we have tried and failed to send it via UKcosmo. Abstract registration ends in less than two weeks *(April 30) *so I am trying to reach as many UK groups as possible. Many thanks ! Ana ===== Dear all, **apologies if you receive this message from multiple channels.** Registration for Cosmo26 <https://cosmo-26.lorentz.leidenuniv.nl/> is now open. We look forward to welcoming you in Leiden (Netherlands), 24-28 August The Organizing Committee Important dates: *Abstract submission March 30 - April 30* . Early bird registration March 30 - May 31, Standard registration May 31. - June 30

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Update on abstracts
by Matthieu Schaller 17 Apr '26

17 Apr '26

Dear all, We are reaching 50 abstract submissions for cosmo-26. It is speeding up. Note that not a single one of the authors ticked "primordial magnetic fields" as their topic. It might be good to promote the event to your networks once more, especially those relevant to PMFs. Cheers, Matthieu -- ———————————————————————————————————— Dr Matthieu Schaller (University lecturer) Lorentz Institute & Leiden Observatory Office: HL 257 The Netherlands Phone: +31 (0)71-527-5522 ————————————————————————————————————

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Convenor emails + Friday meeting - Action required
by Matthieu Schaller 17 Apr '26

17 Apr '26

Dear all, Thanks for reaching out to your contacts to ask them to join as convenors. Now that we have a(n almost) full line-up, could I ask you to send me their email addresses too? I need that to be able to add them as reviewers on the Indico. They are listed on the "Convenors" tab of the Google doc. Or just email me back. Reminder also that we have a meeting on Friday at lunchtime before the THC meeting in Leiden. Finally, make sure to advertise the event within your networks. See the 1st page of the google doc. Thanks, Matthieu -- ———————————————————————————————————— Dr Matthieu Schaller (University lecturer) Lorentz Institute & Leiden Observatory Office: HL 257 The Netherlands Phone: +31 (0)71-527-5522 ————————————————————————————————————

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