The MACRO experiment and its legacy: more than three decades of astroparticle and neutrino physics

Session

MACRO Legacies

28 Jun 2025, 11:50

LNGS and GSSI

Conveners

MACRO Legacies

• Paolo Lipari (INFN Rome)

MACRO Legacies

• Gregory Tarle (University of Michigan)

Contribution list Timetable

61. Flattening the Universe - a scientific journey from Monopoles to Dark Energy

Gregory Tarle (University of Michigan)

28/06/2025, 11:50

Back in 1983, when I got involved in the hunt for Grand Unified (GUT)
Magnetic Monopoles, it was possible that there were enough of them to flatten (close)
the Universe. MACRO searched for GUT monopoles at levels below the closure and
Parker Bound(s) and didn’t find any. A belief in the Inflationary Universe led scientists
like me to search for Dark Matter but there was not enough to...

69. From the unlikely to the impossible: how magnetic monopoles paved the way to the first direct detection of gravitational waves

Erik Katsavounidis (MIT)

28/06/2025, 12:10

The morning (in Eastern US) of September 14, 2015 was marked by a watershed moment in physics and astronomy, the first direct detection of gravitational waves. A magnetic monopole detection would had been an equally landmark event, alas, nature was not as generous. In this brief presentation, I will connect the path to the gravitational wave detection with the journey of MACRO's and the...

70. Multimuon events from cosmic rays with the ALICE detector

Mario Sitta (Università del Piemonte Orientale)

28/06/2025, 12:30

ALICE experiment at CERN Large Hadron Collider, located 52 meters underground, carried out a cosmic data-taking campaign in the period 2025-2018 corresponding to 62.5 days of live time. In this work the analysis of these data is limited to multimuon events defined as events with more than four detected muons. In particular the muon multiplicity distribution (MMD) is studied in the...

73. Muon tomography after MACRO

Daniel Levin (University of Michigan, Physics)

28/06/2025, 12:50

In the 1950s, E. P. George measured the penetrating muon rates to gauge the overburden densities over a tunnel in Australia. Later in 1969, Luis Alvarez pioneered muon tomographic imaging by staging a spark chamber in the second pyramid of Chephren in Giza, Egypt. A quarter century after Alvarez, the MACRO collaboration measured the subterranean muon angular distribution that characterized the...

72. Cosmic Rays: signal or background ?

Ornella Palamara (Fermilab)

28/06/2025, 14:30

From the study of underground multimuon events to their effects in surface neutrino experiments

71. Monopole, Astrophysics and Cosmic Ray observations with long baseline experiments

Alec Habig (University of Minnesota Duluth)

28/06/2025, 14:50

The MINOS and NOvA long baseline neutrino experiments have near detectors 100m underground at Fermilab and far detectors in Minnesota 700m underground (MINOS) and on the surface with minimal overburden (NOvA). They are large highly segmented scintillator detectors like MACRO for good cosmic ray tracking and timing, and have followed up on MACRO measurements of the cosmic ray seasonal...

74. From neutrinos underground to water, ice and space

Teresa Montaruli (University of Geneva - Departement de physique nucleaire et corpusculaire)

28/06/2025, 15:10

I will describe the starting steps in MACRO to selected results of IceCube, ANTARES/KM3NeT and then to future from space