OPERA observes the second tau neutrino

Jun 07, 2012

(Phys.org) -- The OPERA collaboration has announced yesterday at the Neutrino 2012 conference in Japan, the observation of their second neutrino tau interaction, after the first observation made in 2010.

In an official note the collaboration explains that "The was designed to search for the very rare and peculiar phenomenon of neutrino oscillations, according to which muon neutrinos along their path transform into a different type of neutrinos, the so-called .

The at , Geneva, produce an intense beam of muon neutrinos which is sent towards the Gran Sasso National Laboratory of INFN.

Thanks to their extremely rare interactions with matter, neutrinos arrive unperturbed at Gran Sasso after crossing 730 km of rock. The OPERA experimental apparatus located at Gran Sasso acts like a photographic camera with a mass of 1250 tons, capable of recording interactions of tau neutrinos, thus being able to demonstrate the phenomenon.

The experiment is taking data since 2008 and in 2010 the Collaboration reported the observation of a first tau neutrino. Since then, the experiment has collected more data, analyzing with micrometric accuracy several thousands of neutrino interactions.

At the Neutrino 2012 International Conference in Kyoto, Japan, on June 5th, the Collaboration just reported the observation of their second neutrino tau interaction. This new event is an important step towards the accomplishment of the final goal of the experiment."

OPERA is an experiment designed and realized by a group of 160 researchers from universities and scientific institutes in Belgium, Croatia, France, Germany, Israel, Italy, Japan, Korea, Russia, Tunisia, Switzerland, and Turkey.

Explore further: Lightweight membrane can significantly reduce in-flight aircraft noise

Related Stories

CERN neutrino project on target

Aug 16, 2005

Scientists at CERN announced the completion of the target assembly for the CERN neutrinos to Gran Sasso project, CNGS. On schedule for start-up in May 2006, CNGS will send a beam of neutrinos through the Earth to the Gran ...

Green light for the neutrino beam from Cern to Gran Sasso

Sep 12, 2006

The delivery of the neutrino beam (Cngs) from Cern and the beginning of a new generation of experiments were officially celebrated today at Infn (Italian National Institute for Nuclear Physics) National Laboratories of Gran ...

New results confirm standard neutrino theory

Feb 16, 2010

(PhysOrg.com) -- In its search for a better understanding of the mysterious neutrinos, a group of experimenters at DOE’s Fermi National Accelerator Laboratory has announced results that confirm the theory ...

Neutrinos change flavors while crossing Japan

Jun 15, 2011

By shooting a beam of neutrinos through a small slice of the Earth under Japan, physicists say they've caught the particles changing their stripes in new ways. These observations may one day help explain why the universe ...

Physicists: Did neutrinos break the speed of light?

Nov 23, 2011

(PhysOrg.com) -- The revolutionary news that an experiment measured particles traveling faster than the speed of light drew varied ages and backgrounds to a standing-room only physics department forum, "Faster ...

Recommended for you

Thinner capsules yield faster implosions

23 hours ago

In National Ignition Facility (NIF) inertial confinement fusion (ICF) experiments, the fusion fuel implodes at a high speed in reaction to the rapid ablation, or blow-off, of the outer layers of the target ...

Direct visualization of magnetoelectric domains

Apr 27, 2015

A novel microscopy technique called magnetoelectric force microscopy (MeFM) was developed to detect the local cross-coupling between magnetic and electric dipoles. Combined experimental observation and theoretical ...

Upside down and inside out

Apr 27, 2015

Researchers have captured the first 3D video of a living algal embryo turning itself inside out, from a sphere to a mushroom shape and back again. The results could help unravel the mechanical processes at ...

Heat makes electrons spin in magnetic superconductors

Apr 24, 2015

Physicists have shown how heat can be exploited for controlling magnetic properties of matter. The finding helps in the development of more efficient mass memories. The result was published yesterday in Physical Review Le ...

User comments : 0

Please sign in to add a comment. Registration is free, and takes less than a minute. Read more

Click here to reset your password.
Sign in to get notified via email when new comments are made.