BEGIN:VCALENDAR VERSION:2.0 PRODID:-//linuxsoftware.nz//NONSGML Joyous v1.4//EN BEGIN:VEVENT SUMMARY:Building particle physics from the bottom up DTSTART:20241219T140000Z DTEND:20241219T160000Z DTSTAMP:20260801T112338Z UID:54de2b83-4320-4fa0-9173-e71223f54072 SEQUENCE:3 CREATED:20241206T092100Z DESCRIPTION:If you are a physics student\, you have probably felt that und erstanding physical phenomena involves finding the correct set of equation s to describe them\, and very carefully solving these equations without ma king any mistakes. But\, surprisingly\, it turns out that physical phenome na are often incredibly constrained by asking for consistency with basic p hysical principles\, and one can more quickly and reliably "\;just wri te down the correct final answer"\; by making sure these are satisfied . In this talk\, I will put this philosophy into practice\, and show how d oing physics in this way is much more forgiving of little mistakes\, as we let the consistency conditions guide both our thinking and our computatio ns. I will start with some simple examples of everyday physics and build u p to understanding how relativity and quantum mechanics strongly constrain and dictate the allowed interactions of elementary particles. I will end by explaining how this way of approaching physical problems is even more p owerful in the context of the most fundamental observables in particle phy sics -- scattering amplitudes. LAST-MODIFIED:20241206T095552Z LOCATION:Anf. Abreu Faro (Complexo Interdisciplinar) URL:http://df.vps.tecnico.ulisboa.pt/en/events/escapadinhas-na-natureza-co m-piscina/ X-ALT-DESC;FMTTYPE=text/html:

If you are a physic s student\, you have probably felt that understanding physical phenomena i nvolves finding the correct set of equations to describe them\, and very c arefully solving these equations without making any mistakes.

Bu t\, surprisingly\, it turns out that physical phenomena are often incredib ly constrained by asking for consistency with basic physical principles\, and one can more quickly and reliably "\;just write down the correct f inal answer"\; by making sure these are satisfied. In this talk\, I wi ll put this philosophy into practice\, and show how doing physics in this way is much more forgiving of little mistakes\, as we let the consistency conditions guide both our thinking and our computations.

I will start with some simple examples of everyday physics and build up to unders tanding how relativity and quantum mechanics strongly constrain and dictat e the allowed interactions of elementary particles. I will end by explaini ng how this way of approaching physical problems is even more powerful in the context of the most fundamental observables in particle physics -- sca ttering amplitudes.

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