The first post on this blog was made on May 22, 2011. In the first 14 years of this blog, which ended on May 21, 2025, I made 2805 posts, which is just slightly more than 200 posts per year.
Unlike its sister blog, Wash Park Prophet, the number of posts per year has been fairly consistent for this entire time period.
I have made minor updates to my two conjectures pages to reflect new developments and correct errors of spelling, grammar, and style, and to enhance clarity.
Ancient human fingerprint suggests Neanderthals made art
ReplyDeletehttps://www.bbc.com/news/articles/cn0g9jv707yo
Science, Stone Age Archaeology
Precise Timeline Reconstructed for When Denisovans, Neanderthals, and Homo sapiens Inhabited Denisova Cave Over 300,000 Years
https://www.msn.com/en-us/news/world/we-now-know-when-denisovans-neanderthals-and-modern-humans-inhabited-denisova-cave/ar-AA1FlvEZ
Happy fourteenth! In another fours years it will be legal to drink. In two it will be driving. Yesh...
ReplyDelete@neo Thanks again for the heads up, particularly the second article. I have no doubt that Neanderthals made art and engaged in other modern human-like cultural practices. They were pretty smart, but less culturally flexible and mentally "plastic."
ReplyDelete@Guy Thanks. I'm not sure that drinking would improve the blog's quality, however.
ReplyDeleteThey were pretty smart, but less culturally flexible and mentally "plastic."
ReplyDeletethere is ChĆ¢telperronian possible by Neanderthals.
arXiv:2505.07923 (hep-ph)
[Submitted on 12 May 2025]
A Superalgebra Within: representations of lightest standard model particles form a Z -graded algebra
N. Furey
It is demonstrated how a set of particle representations, familiar from the Standard Model, collectively form a superalgebra. Those representations mirroring the behaviour of the Standard Model's gauge bosons, and three generations of fermions, are each included in this algebra, with exception only to those irreps involving the top quark. This superalgebra is isomorphic to the Euclidean Jordan algebra of hermitian matrices, C and is generated by division algebras. The division algebraic substructure enables a natural factorization between internal and spacetime symmetries. It also allows for the definition of a Z grading on the algebra. Those internal symmetries respecting this substructure are found to be in addition to four iterations of . For spatial symmetries, one finds multiple copies of . Given its Jordan algebraic foundation, and its apparent non-relativistic character, the model may supply a bridge between particle physics and quantum computation.
Comments: 16 pages
Subjects: High Energy Physics - Phenomenology (hep-ph)
Report number: HU-EP-25/16
Furey (2025): Ho hum.
ReplyDeletenew update
ReplyDelete[Submitted on 30 May 2025]
Search for a new 17 MeV resonance via annihilation with the PADME Experiment
F. Bossi, R. De Sangro, C. Di Giulio, E. Di Meco, D. Domenici, G. Finocchiaro, L.G. Foggetta, M. Garattini, P. Gianotti, M. Mancini, I. Sarra, T. Spadaro, C. Taruggi, E. Vilucchi, K. Dimitrova, S. Ivanov, Sv. Ivanov, K. Kostova, V. Kozhuharov, R. Simeonov, F. Ferrarotto, E. Leonardi, P. Valente, E. Long, G.C. Organtini, M. Raggi, A. Frankenthal
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High Energy Physics - Experiment
arXiv:2505.24797 (hep-ex)
[Submitted on 30 May 2025]
Search for a new 17 MeV resonance via annihilation with the PADME Experiment
F. Bossi, R. De Sangro, C. Di Giulio, E. Di Meco, D. Domenici, G. Finocchiaro, L.G. Foggetta, M. Garattini, P. Gianotti, M. Mancini, I. Sarra, T. Spadaro, C. Taruggi, E. Vilucchi, K. Dimitrova, S. Ivanov, Sv. Ivanov, K. Kostova, V. Kozhuharov, R. Simeonov, F. Ferrarotto, E. Leonardi, P. Valente, E. Long, G.C. Organtini, M. Raggi, A. Frankenthal
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The PADME Experiment at the Frascati DA NE LINAC has searched for a hypothetical particle with mass around 17 MeV, commonly referred to as the X17, using a positron beam incident on a fixed target. The beam energy was varied between 262 and 296 MeV, corresponding to center-of-mass energies between 16.4 and 17.4 MeV. The X17 should be produced resonantly via annihilation when approaches its mass, inducing an excess of events with a two-body final state over the background expectation. The beam energy spacing was fixed to less than half the expected width of the resonance's line shape. Uncertainties below 1% per point were achieved. A blind analysis has been performed. The data are consistent with the expected background in most of the explored energy range, and limits are set in previously unexplored regions of the available parameter space. The most significant deviation is found for MeV, corresponding to a global significance of approximately 2 standard deviations over the null hypothesis expectation.
Comments: 23 pages, 24 figures
Subjects: High Energy Physics - Experiment (hep-ex)
Cite as: arXiv:2505.24797 [hep-ex]
(or arXiv:2505.24797v1 [hep-ex] for this version)
https://doi.org/10.48550/arXiv.2505.24797
I saw it. The two sigma deviation is consistent with a background only result.
ReplyDeleteno excess any where except 2 sigma exactly ATOMKI x17
ReplyDeletePADME Experiment run 4 the hope to get enough data points and improve detectors for 5 sigma if successful
Preparations for PADME Run IV currently ongoing
▪ New Micromegas chambers ➔ š¯‘’+š¯‘’− vs. š¯›¾ background
separation and new signatures possible
▪ More beam operation stability measurements to reduce
systematic uncertainties
▪ More data taking! (to reduce statistical uncertainties)
• Expected to completely cover the open vector X17
parameter space
• Data taking soon!
https://indico.global/event/652/contributions/16905/attachments/57490/110416/UCLADM2025_PADME_v2.pdf
I fully expect alternative within the Standard Model explanations to prevail.
ReplyDeletei may take place in another 5 years to verify X17, if it exists. how would your world view change should it does ? x17 could be the first hidden sector
ReplyDelete