Antihydrogen, a positron bound to an antiproton, is the simplest antiatom. Its counterpart— hydrogen—is one of the most precisely investigated and best understood systems in physics research. High-resolution comparisons of both systems provide sensitive tests of CPT symmetry, which is the most fundamental symmetry in the Standard Model of elementary particle physics. Any measured difference would point to CPT violation and thus to new physics. Here we report the development of an antihydrogen source using a cusp trap for in-flight spectroscopy. A total of 80 antihydrogen atoms are unambiguously detected 2.7m downstream of the production region, where perturbing residual magnetic fields are small. This is a major step towards precision spectroscopy of the ground-state hyperfine splitting of antihydrogen using Rabi-like beam spectroscopy

A source of antihydrogen for in-flight hyperfine spectroscopy

LEALI, Marco;MASCAGNA, Valerio;VENTURELLI, Luca;ZURLO, Nicola;LODI RIZZINI, Evandro;
2014-01-01

Abstract

Antihydrogen, a positron bound to an antiproton, is the simplest antiatom. Its counterpart— hydrogen—is one of the most precisely investigated and best understood systems in physics research. High-resolution comparisons of both systems provide sensitive tests of CPT symmetry, which is the most fundamental symmetry in the Standard Model of elementary particle physics. Any measured difference would point to CPT violation and thus to new physics. Here we report the development of an antihydrogen source using a cusp trap for in-flight spectroscopy. A total of 80 antihydrogen atoms are unambiguously detected 2.7m downstream of the production region, where perturbing residual magnetic fields are small. This is a major step towards precision spectroscopy of the ground-state hyperfine splitting of antihydrogen using Rabi-like beam spectroscopy
File in questo prodotto:
File Dimensione Formato  
Kuroda_Venturelli_AntihydrogenBeam_NatureCommunications_2014.pdf

solo utenti autorizzati

Tipologia: Full Text
Licenza: NON PUBBLICO - Accesso privato/ristretto
Dimensione 468.06 kB
Formato Adobe PDF
468.06 kB Adobe PDF   Visualizza/Apri   Richiedi una copia

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11379/321506
 Attenzione

Attenzione! I dati visualizzati non sono stati sottoposti a validazione da parte dell'ateneo

Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus 136
  • ???jsp.display-item.citation.isi??? 131
social impact