Dibya S. Chattopadhyay
@dibya_explores
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Postdoc at @okstate, did my Ph.D. from @TIFRScience. I usually dabble in neutrino and astroparticle physics.
Stillwater, OK
Joined June 2022
Vedran and I explore all this in detail in “Does the 220 PeV Event at KM3NeT Point to New Physics?” [. The propagation length difference could be the key—allowing new physics to ease the IceCube–KM3NeT tension! #Neutrinos #Astroparticle #NewPhysics (10/10).
arxiv.org
The KM3NeT collaboration recently reported the observation of KM3-230213A, a neutrino event with an energy exceeding 100 PeV, more than an order of magnitude higher than the most energetic...
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To summarize, the 220 PeV neutrino at KM3NeT and the resulting (2–3.5)σ tension with IceCube suggests something intriguing. We propose the exciting possibility that neutrino telescopes may have started detecting new physics beyond the standard model. #Neutrinos #NewPhysics (9/10).
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Scenario 2: Non-standard neutrino interactions (NSI) offer an oscillatory solution—no resonance needed! We show that sterile–muon neutrino oscillations can be enhanced, easing the IceCube–KM3NeT tension. This works for a sterile neutrino mass of ~100 eV. #NewPhysics (8/10)
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For Scenario 1, we use a model proposed by M. Pospelov [ to get a matter-induced resonance. For sterile neutrino mass of a few keV and matter potential that is at least 30 times larger than the SM charged current potential, we see a viable regime. 📄(7/10)
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Our 2 new physics scenarios involve: (1) a new matter potential that triggers resonant sterile-to-active transitions, & (2) off-diagonal non-standard neutrino interactions. In both cases, we increase the active neutrino flux at ~100 km or larger length scales. #NewPhysics (6/10).
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In our paper [, we explore two new physics scenarios using propagation differences to resolve the tension. Sterile neutrinos could convert into active ones via matter effects—enhanced for KM3NeT by the longer path through Earth. #NewPhysics (5/10).
arxiv.org
The KM3NeT collaboration recently reported the observation of KM3-230213A, a neutrino event with an energy exceeding 100 PeV, more than an order of magnitude higher than the most energetic...
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What makes KM3NeT and IceCube different for this event? 🤔.The 220 PeV neutrino at KM3NeT traveled 147 km through rock & sea. But at IceCube, a neutrino from the same sky location would cross just 14 km of ice. Could this be the key to the mystery? #Neutrinos #NewPhysics (4/10)
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A recent study (“Clash of the Titans…”, by Li, Machado, Naredo-Tuero & Schwemberger finds a ~(2–3.5)σ tension, depending on the type of neutrino source. Even for a transient, point-like origin, the anomaly persists. (3/10).
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Rather unexpectedly, the IceCube detector, despite its larger effective area and longer runtime, was not the first to see a neutrino at these energies. Why did KM3NeT get there first? #Neutrinos #Astroparticle #AstroparticlePhysics (2/10).
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New Paper! 🚨.Our latest work “Does the 220 PeV Event at KM3NeT Point to New Physics?” is now on arXiv: [.The story starts with an intrigue: Feb 2023, KM3NeT in the Mediterranean detected the highest-energy neutrino ever—220 PeV! #Neutrinos (1/10).
arxiv.org
The KM3NeT collaboration recently reported the observation of KM3-230213A, a neutrino event with an energy exceeding 100 PeV, more than an order of magnitude higher than the most energetic...
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RT @CHEP_IISc: We are saddened to share the passing of Padma Shri Prof. Rohini Godbole. A renowned scientist, leader, mentor, and champion….
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RT @krxiv_hep_ph: Neutrino Oscillations in Presence of Diagonal Elements of Scalar NSI: An Analytic Approach.Dharit….
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RT @gandysupta: Very excited about my latest paper ( with two exceptionally talented PhD students from Tata Institu….
arxiv.org
We present a minimal cosmological solution to the hierarchy problem. Our model consists of a light pseudoscalar and an extra Higgs doublet in addition to the field content of the Standard Model....
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😂😂😂😂.
gpt-6 will have the intelligence of someone who decided not to get a PhD
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The rise of the planet of the apes was not really in my 2024 bingo card.
New research marks the first documented case of an ape using a plant with scientifically proven medicinal properties to treat a fresh wound.
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Whoa!.
Rubin Observatory's 8.4-meter mirror is finally, well, a mirror! 🥳. The glass got its shiny coating this past weekend—but what did that actually look like?. Find out in the fifth and final video in our "Making of Rubin's 8.4-meter Mirror" series ✨. #CaptureTheCosmos
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Windows XP helped me do something similar in my childhood. Iykyk.
Ippitsuryu is an ancient Japanese tradition of creating the flowing, river-like body of the dragon in just a single stroke. [📹 Keisuke Teshima].
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The fire in this statement! 🔥🔥.
I don't quit academia because I am academia. Academia is not owned by those who have tenure or positional power. As long as we are doing honest research and not a crackpot, we are as academic as anyone.
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RT @PythonMaps: Another thread of maps I like. This time we are looking loosely at the Indian sub continent. Included are India, Pakistan,….
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