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A search for the analogue to Cherenkov radiation by high energy neutrinos at superluminal speeds in ICARUS

Identifieur interne : 000430 ( PascalFrancis/Curation ); précédent : 000429; suivant : 000431

A search for the analogue to Cherenkov radiation by high energy neutrinos at superluminal speeds in ICARUS

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RBID : Pascal:12-0204136

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English descriptors

Abstract

The OPERA Collaboration (2011) [1] has reported evidence of superluminal vμ propagation between CERN and the LNGS. Cohen and Glashow (2011) [2] argued that such neutrinos should lose energy by producing photons and e+e- pairs, through Z0 mediated processes analogous to Cherenkov radiation. In terms of the parameter δ ≡ (v2v - v2c)/v2c, the OPERA result corresponds to δ ≃ 5.1 10-5. For this value (note that (vv - vc)/vc ≃ δ 2 ≃ 2.5.10-5) of δ, a very significant deformation of the neutrino energy spectrum and an abundant production of photons and e+e- pairs should be observed at LNGS. We present an analysis based on the 2010 and part of the 2011 data sets from the ICARUS experiment, located at Gran Sasso National Laboratory and using the same neutrino beam from CERN. We find that the rates and deposited energy distributions of neutrino events in ICARUS agree with the expectations for an unperturbed spectrum of the CERN neutrino beam, as also reported by OPERA. Our results therefore refute a superluminal interpretation of the OPERA result according to the Cohen and Glashow (2011) prediction [2] for a weak current analog to Cherenkov radiation. In a dedicated search, no superluminal Cherenkov-like e+e- pair or γ emission event has been directly observed inside the fiducial volume of the "bubble chamber-like" ICARUS TPC-LAr detector, setting the much stricter limit of δ < 2.5 . 10-8 at the 90% confidence level, comparable with the one due to the observations from the SN1987a (M.J. Longo, 1987 [4]). The observations of high energy neutrino events by Super-Kamiokande and IceCube are also pointing to a much stricter limit on δ.
pA  
A01 01  1    @0 0370-2693
A02 01      @0 PYLBAJ
A03   1    @0 Phys. lett., Sect. B
A05       @2 711
A06       @2 3-4
A08 01  1  ENG  @1 A search for the analogue to Cherenkov radiation by high energy neutrinos at superluminal speeds in ICARUS
A17 01  1    @1 ICARUS Collaboration @3 INC
A20       @1 270-275
A21       @1 2012
A23 01      @0 ENG
A43 01      @1 INIST @2 9425B @5 354000506939450060
A44       @0 0000 @1 © 2012 INIST-CNRS. All rights reserved.
A45       @0 17 ref.
A47 01  1    @0 12-0204136
A60       @1 P
A61       @0 A
A64 01  1    @0 Physics letters. Section B
A66 01      @0 GBR
C01 01    ENG  @0 The OPERA Collaboration (2011) [1] has reported evidence of superluminal vμ propagation between CERN and the LNGS. Cohen and Glashow (2011) [2] argued that such neutrinos should lose energy by producing photons and e+e- pairs, through Z0 mediated processes analogous to Cherenkov radiation. In terms of the parameter δ ≡ (v2v - v2c)/v2c, the OPERA result corresponds to δ ≃ 5.1 10-5. For this value (note that (vv - vc)/vc ≃ δ 2 ≃ 2.5.10-5) of δ, a very significant deformation of the neutrino energy spectrum and an abundant production of photons and e+e- pairs should be observed at LNGS. We present an analysis based on the 2010 and part of the 2011 data sets from the ICARUS experiment, located at Gran Sasso National Laboratory and using the same neutrino beam from CERN. We find that the rates and deposited energy distributions of neutrino events in ICARUS agree with the expectations for an unperturbed spectrum of the CERN neutrino beam, as also reported by OPERA. Our results therefore refute a superluminal interpretation of the OPERA result according to the Cohen and Glashow (2011) prediction [2] for a weak current analog to Cherenkov radiation. In a dedicated search, no superluminal Cherenkov-like e+e- pair or γ emission event has been directly observed inside the fiducial volume of the "bubble chamber-like" ICARUS TPC-LAr detector, setting the much stricter limit of δ < 2.5 . 10-8 at the 90% confidence level, comparable with the one due to the observations from the SN1987a (M.J. Longo, 1987 [4]). The observations of high energy neutrino events by Super-Kamiokande and IceCube are also pointing to a much stricter limit on δ.
C02 01  3    @0 001B00
C02 02  3    @0 001B20
C02 03  3    @0 001B10
C03 01  3  FRE  @0 Rayonnement Cerenkov @5 26
C03 01  3  ENG  @0 Cherenkov radiation @5 26
C03 02  3  FRE  @0 Neutrino @5 27
C03 02  3  ENG  @0 Neutrinos @5 27
C03 03  3  FRE  @0 CERN @5 28
C03 03  3  ENG  @0 CERN @5 28
C03 04  3  FRE  @0 Annihilation positon @5 29
C03 04  3  ENG  @0 Positron annihilation @5 29
C03 05  3  FRE  @0 Déformation @5 30
C03 05  3  ENG  @0 Deformation @5 30
C03 06  3  FRE  @0 Spectre énergie @5 31
C03 06  3  ENG  @0 Energy spectra @5 31
C03 07  3  FRE  @0 Production photon @5 32
C03 07  3  ENG  @0 Photon production @5 32
C03 08  3  FRE  @0 Faisceau neutrino @5 33
C03 08  3  ENG  @0 Neutrino beams @5 33
C03 09  3  FRE  @0 Particule sans masse @5 34
C03 09  3  ENG  @0 Massless particles @5 34
C03 10  3  FRE  @0 Particule élémentaire @5 35
C03 10  3  ENG  @0 Elementary particles @5 35
N21       @1 156
N44 01      @1 OTO
N82       @1 OTO

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Pascal:12-0204136

Le document en format XML

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<div type="abstract" xml:lang="en">The OPERA Collaboration (2011) [1] has reported evidence of superluminal v
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mediated processes analogous to Cherenkov radiation. In terms of the parameter δ ≡ (v
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<sup>2</sup>
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<sup>-5</sup>
. For this value (note that (v
<sub>v</sub>
- v
<sub>c</sub>
)/v
<sub>c</sub>
≃ δ 2
<sub> </sub>
≃ 2.5.10
<sup>-5</sup>
) of δ, a very significant deformation of the neutrino energy spectrum and an abundant production of photons and e
<sup>+</sup>
e
<sup>-</sup>
pairs should be observed at LNGS. We present an analysis based on the 2010 and part of the 2011 data sets from the ICARUS experiment, located at Gran Sasso National Laboratory and using the same neutrino beam from CERN. We find that the rates and deposited energy distributions of neutrino events in ICARUS agree with the expectations for an unperturbed spectrum of the CERN neutrino beam, as also reported by OPERA. Our results therefore refute a superluminal interpretation of the OPERA result according to the Cohen and Glashow (2011) prediction [2] for a weak current analog to Cherenkov radiation. In a dedicated search, no superluminal Cherenkov-like e
<sup>+</sup>
e
<sup>-</sup>
pair or γ emission event has been directly observed inside the fiducial volume of the "bubble chamber-like" ICARUS TPC-LAr detector, setting the much stricter limit of δ < 2.5 . 10
<sup>-8</sup>
at the 90% confidence level, comparable with the one due to the observations from the SN1987a (M.J. Longo, 1987 [4]). The observations of high energy neutrino events by Super-Kamiokande and IceCube are also pointing to a much stricter limit on δ.</div>
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<sub>μ</sub>
propagation between CERN and the LNGS. Cohen and Glashow (2011) [2] argued that such neutrinos should lose energy by producing photons and e
<sup>+</sup>
e
<sup>-</sup>
pairs, through Z
<sup>0</sup>
mediated processes analogous to Cherenkov radiation. In terms of the parameter δ ≡ (v
<sup>2</sup>
<sub>v</sub>
- v
<sup>2</sup>
<sub>c</sub>
)/v
<sup>2</sup>
<sub>c</sub>
, the OPERA result corresponds to δ ≃ 5.1 10
<sup>-5</sup>
. For this value (note that (v
<sub>v</sub>
- v
<sub>c</sub>
)/v
<sub>c</sub>
≃ δ 2
<sub> </sub>
≃ 2.5.10
<sup>-5</sup>
) of δ, a very significant deformation of the neutrino energy spectrum and an abundant production of photons and e
<sup>+</sup>
e
<sup>-</sup>
pairs should be observed at LNGS. We present an analysis based on the 2010 and part of the 2011 data sets from the ICARUS experiment, located at Gran Sasso National Laboratory and using the same neutrino beam from CERN. We find that the rates and deposited energy distributions of neutrino events in ICARUS agree with the expectations for an unperturbed spectrum of the CERN neutrino beam, as also reported by OPERA. Our results therefore refute a superluminal interpretation of the OPERA result according to the Cohen and Glashow (2011) prediction [2] for a weak current analog to Cherenkov radiation. In a dedicated search, no superluminal Cherenkov-like e
<sup>+</sup>
e
<sup>-</sup>
pair or γ emission event has been directly observed inside the fiducial volume of the "bubble chamber-like" ICARUS TPC-LAr detector, setting the much stricter limit of δ < 2.5 . 10
<sup>-8</sup>
at the 90% confidence level, comparable with the one due to the observations from the SN1987a (M.J. Longo, 1987 [4]). The observations of high energy neutrino events by Super-Kamiokande and IceCube are also pointing to a much stricter limit on δ.</s0>
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