A Search for Lorentz Invariance and CPT Violation with the MINOS Far   Detector

MINOS Collaboration: P. Adamson; D. J. Auty; D. S. Ayres; C.; Backhouse; G. Barr; W. L. Barrett; M. Bishai; A. Blake; G. J. Bock; D. J.; Boehnlein; D. Bogert; C. Bower; S. Budd; S. Cavanaugh; D. Cherdack; S.; Childress; B. C. Choudhary; J. A. B. Coelho; J. H. Cobb; S. J. Coleman; L.; Corwin; J. P. Cravens; D. Cronin-Hennessy; I. Z. Danko; J. K. de Jong; N. E.; Devenish; M. V. Diwan; M. Dorman; C. O. Escobar; J. J. Evans; E. Falk; G. J.; Feldman; M. V. Frohne; H. R. Gallagher; R. A. Gomes; M. C. Goodman; P.; Gouffon; R. Gran; N. Grant; K. Grzelak; A. Habig; D. Harris; P. G. Harris; J.; Hartnell; R. Hatcher; A. Himmel; A. Holin; X. Huang; J. Hylen; J. Ilic; G. M.; Irwin; Z. Isvan; D. E. Jaffe; C. James; D. Jensen; T. Kafka; S. M. S.; Kasahara; G. Koizumi; S. Kopp; M. Kordosky; Z. Krahn; A. Kreymer; K. Lang; G.; Lefeuvre; J. Ling; P. J. Litchfield; L. Loiacono; P. Lucas; W. A. Mann; M. L.; Marshak; N. Mayer; A. M. McGowan; R. Mehdiyev; J. R. Meier; M. D. Messier; D.; G. Michael; J. L. Miller; W. H. Miller; S. R. Mishra; J. Mitchell; C. D.; Moore; L. Mualem; S. Mufson; J. Musser; D. Naples; J. K. Nelson; H. B.; Newman; R. J. Nichol; W. P. Oliver; M. Orchanian; J. Paley; R. B. Patterson,; T. Patzak; G. Pawloski; G. F. Pearce; R. Pittam; R. K. Plunkett; J.; Ratchford; T. M. Raufer; B. Rebel; P. A. Rodrigues; C. Rosenfeld; H. A.; Rubin; V. A. Ryabov; M. C. Sanchez; N. Saoulidou; J. Schneps; P. Schreiner,; V. K. Semenov; P. Shanahan; W. Smart; A. Sousa; M. Strait; N. Tagg; R. L.; Talaga; J. Thomas; M. A. Thomson; G. Tinti; R. Toner; G. Tzanakos; J. Urheim,; P. Vahle; B. Viren; A. Weber; R. C. Webb; C. White; L. Whitehead; S. G.; Wojcicki; D. M. Wright; T. Yang; M. Zois; and R. Zwaska

arXiv:1007.2791·hep-ex·November 21, 2014

A Search for Lorentz Invariance and CPT Violation with the MINOS Far Detector

MINOS Collaboration: P. Adamson, D. J. Auty, D. S. Ayres, C., Backhouse, G. Barr, W. L. Barrett, M. Bishai, A. Blake, G. J. Bock, D. J., Boehnlein, D. Bogert, C. Bower, S. Budd, S. Cavanaugh, D. Cherdack, S., Childress, B. C. Choudhary, J. A. B. Coelho, J. H. Cobb, S. J. Coleman

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TL;DR

This study searched for sidereal variations in neutrino detection rates to test Lorentz and CPT invariance, finding no evidence but setting significantly improved limits on potential violations within the Standard-Model Extension framework.

Contribution

It provides the first search for sidereal modulation effects in neutrino oscillations and significantly improves existing limits on Lorentz and CPT violation coefficients.

Findings

01

No evidence of sidereal modulation was observed.

02

Upper limits on Lorentz and CPT violation coefficients were improved by factors of 20-510.

03

Constraints on fundamental symmetries in neutrino physics were tightened.

Abstract

We searched for a sidereal modulation in the MINOS far detector neutrino rate. Such a signal would be a consequence of Lorentz and CPT violation as described by the Standard-Model Extension framework. It also would be the first detection of a perturbative effect to conventional neutrino mass oscillations. We found no evidence for this sidereal signature and the upper limits placed on the magnitudes of the Lorentz and CPT violating coefficients describing the theory are an improvement by factors of $20 - 510$ over the current best limits found using the MINOS near detector.

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