The cosmic e± anomaly

K. Auchettl; C. Balázs

The cosmic e± anomaly

School of Physics and Astronomy

Research output: Chapter in Book/Report/Conference proceeding › Conference Paper › Other

Abstract

Via a Bayesian likelihood analysis using 219 recent cosmic ray spectral data points we extract the anomalous part of the cosmic e± flux. First we show that a significant tension exists between the e± related and the rest of the fluxes. Interpreting this tension as the presence of an anomalous component in the e± related data, we then infer the values of selected cosmic ray propagation parameters excluding the anomalous data sample from the analysis. Based on these values we calculate background predictions with theoretical uncertainties for PAMELA and Fermi-LAT. We find a statistically significant deviation between the Fermi-LAT e^- +e⁺ data and the predicted background even when (systematic) uncertainties are taken into account. Identifying this deviation as an anomalous e±contribution, we make an attempt to distinguish between various sources that may be responsible for the anomalous e± flux.

Original language	English
Title of host publication	Proceedings to the 14th Workshop
Subtitle of host publication	What Comes Beyond the Standard Models
Pages	1-8
Number of pages	8
Volume	12
Publication status	Published - 2011
Event	Bled Workshop in Physics 2011: What Comes Beyond the Standard Models - Bled, Slovenia Duration: 11 Jul 2011 → 21 Jul 2011

Publication series

Name	Bled Workshops in Physics
Publisher	DMFA – ZALOZNISTVO
Number	2
Volume	12
ISSN (Print)	1580-4992

Workshop

Workshop	Bled Workshop in Physics 2011
Country/Territory	Slovenia
City	Bled
Period	11/07/11 → 21/07/11
Other	Proceedings to the 14th International Workshop "What Comes Beyond the Standard Models", July 11-21, 2011, Bled, Slovenia

Cite this

@inproceedings{0064460fab9a42e6803d1ffe5c72fd77,

title = "The cosmic e± anomaly",

abstract = "Via a Bayesian likelihood analysis using 219 recent cosmic ray spectral data points we extract the anomalous part of the cosmic e± flux. First we show that a significant tension exists between the e± related and the rest of the fluxes. Interpreting this tension as the presence of an anomalous component in the e± related data, we then infer the values of selected cosmic ray propagation parameters excluding the anomalous data sample from the analysis. Based on these values we calculate background predictions with theoretical uncertainties for PAMELA and Fermi-LAT. We find a statistically significant deviation between the Fermi-LAT e- +e+ data and the predicted background even when (systematic) uncertainties are taken into account. Identifying this deviation as an anomalous e±contribution, we make an attempt to distinguish between various sources that may be responsible for the anomalous e± flux.",

author = "K. Auchettl and C. Bal{\'a}zs",

year = "2011",

language = "English",

volume = "12",

series = "Bled Workshops in Physics",

publisher = "DMFA – ZALOZNISTVO",

number = "2",

pages = "1--8",

booktitle = "Proceedings to the 14th Workshop",

note = "Bled Workshop in Physics 2011 : What Comes Beyond the Standard Models ; Conference date: 11-07-2011 Through 21-07-2011",

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TY - GEN

T1 - The cosmic e± anomaly

AU - Auchettl, K.

AU - Balázs, C.

PY - 2011

Y1 - 2011

N2 - Via a Bayesian likelihood analysis using 219 recent cosmic ray spectral data points we extract the anomalous part of the cosmic e± flux. First we show that a significant tension exists between the e± related and the rest of the fluxes. Interpreting this tension as the presence of an anomalous component in the e± related data, we then infer the values of selected cosmic ray propagation parameters excluding the anomalous data sample from the analysis. Based on these values we calculate background predictions with theoretical uncertainties for PAMELA and Fermi-LAT. We find a statistically significant deviation between the Fermi-LAT e- +e+ data and the predicted background even when (systematic) uncertainties are taken into account. Identifying this deviation as an anomalous e±contribution, we make an attempt to distinguish between various sources that may be responsible for the anomalous e± flux.

AB - Via a Bayesian likelihood analysis using 219 recent cosmic ray spectral data points we extract the anomalous part of the cosmic e± flux. First we show that a significant tension exists between the e± related and the rest of the fluxes. Interpreting this tension as the presence of an anomalous component in the e± related data, we then infer the values of selected cosmic ray propagation parameters excluding the anomalous data sample from the analysis. Based on these values we calculate background predictions with theoretical uncertainties for PAMELA and Fermi-LAT. We find a statistically significant deviation between the Fermi-LAT e- +e+ data and the predicted background even when (systematic) uncertainties are taken into account. Identifying this deviation as an anomalous e±contribution, we make an attempt to distinguish between various sources that may be responsible for the anomalous e± flux.

UR - http://www.scopus.com/inward/record.url?scp=84879892619&partnerID=8YFLogxK

M3 - Conference Paper

AN - SCOPUS:84879892619

VL - 12

T3 - Bled Workshops in Physics

SP - 1

EP - 8

BT - Proceedings to the 14th Workshop

T2 - Bled Workshop in Physics 2011

Y2 - 11 July 2011 through 21 July 2011

ER -

The cosmic e± anomaly

Abstract

Publication series

Workshop

Other files and links

The status of the e +/- cosmic-ray anomaly

ARC Centre of Excellence for Particle Physics at the Tera-Scale

Cite this

The cosmic e± anomaly

Abstract

Publication series

Workshop

Other files and links

Research output

The status of the e +/- cosmic-ray anomaly

Projects

ARC Centre of Excellence for Particle Physics at the Tera-Scale

Cite this