RICE bounds on UHE Neutrino fluxes in the GZK Regime plus bounds on new physics
description
Transcript of RICE bounds on UHE Neutrino fluxes in the GZK Regime plus bounds on new physics
![Page 1: RICE bounds on UHE Neutrino fluxes in the GZK Regime plus bounds on new physics](https://reader036.fdocuments.in/reader036/viewer/2022062301/5681460d550346895db31c53/html5/thumbnails/1.jpg)
RICE bounds on UHE Neutrino fluxes in the GZK Regime
plus bounds on new physics
RICE bounds on UHE Neutrino fluxes in the GZK Regime
plus bounds on new physics
Data from 2000 through 2004 confront models of the world
(PRELIMINARY)
Data from 2000 through 2004 confront models of the world
(PRELIMINARY)
![Page 2: RICE bounds on UHE Neutrino fluxes in the GZK Regime plus bounds on new physics](https://reader036.fdocuments.in/reader036/viewer/2022062301/5681460d550346895db31c53/html5/thumbnails/2.jpg)
Outline
• What RICE is
• What the new data say
• Calculation of bounds on GZK fluxes
• Results
• Calculation of bounds on LSG
• Results
• Summary and Conclusions
![Page 3: RICE bounds on UHE Neutrino fluxes in the GZK Regime plus bounds on new physics](https://reader036.fdocuments.in/reader036/viewer/2022062301/5681460d550346895db31c53/html5/thumbnails/3.jpg)
16 co-authors fromKansas, Delaware,Canterbury, MIT
16 Radio Receivers 200mX200mX200mArray Between 100m and 300m UNDER THE ICE at the SOUTH POLE
A great debt owed toAMANDA
Radio Cherenkov Detection of NeutrinosRadio Cherenkov Detection of Neutrinos
![Page 4: RICE bounds on UHE Neutrino fluxes in the GZK Regime plus bounds on new physics](https://reader036.fdocuments.in/reader036/viewer/2022062301/5681460d550346895db31c53/html5/thumbnails/4.jpg)
RICE data collected 2000 - 2004by the Radio Ice Cherenkov Detector current RICE authors: Ilya Kravchenko,Dave Seckel,Jenni Adams, Steve Churchwell, Pauline Harris, Surujdeo Seunarine, Peter William, Alice Bean, Dave Besson *, Scott Graham, Sarah Holt, Shahid Hussain, Doug McKay, Josh Meyers, John Ralston, Rainer Schiel, Hanah Swift,*Contact: [email protected]
![Page 5: RICE bounds on UHE Neutrino fluxes in the GZK Regime plus bounds on new physics](https://reader036.fdocuments.in/reader036/viewer/2022062301/5681460d550346895db31c53/html5/thumbnails/5.jpg)
RICE Searches for UHE Cosmic Neutrino Hits in Antarctic Ice with Radio Antennas
• Coherent Cherenkov Pulses from Showers• Pulses Amplified and Sent to Surface• Trigger on 4 hits above Threshold*• Triggered pulses Read into Oscilloscope, Saved• Pulses are Time labeled - basis to reconstruct hits • Acceptance of Above Summarized in Veff, the
EFFECTIVE VOLUME *Background Fixes Discriminator Threshold
![Page 6: RICE bounds on UHE Neutrino fluxes in the GZK Regime plus bounds on new physics](https://reader036.fdocuments.in/reader036/viewer/2022062301/5681460d550346895db31c53/html5/thumbnails/6.jpg)
RICE Calibrations and Collateral Experiments
• Direct in situ attenuation length and refractive index in-ice measurements made by RICERS
• Antenna calibrations, gain calibrations, timing calibrations, vertexing tests, … are described in:
• I. Kravchenko et al., Astropart. Phys. 19, (2003) 15; Flux bounds and a recap of the calibrations and testing are presented in I Kravchenko et al., Astropart. Phys. 20, (2003) 195
![Page 7: RICE bounds on UHE Neutrino fluxes in the GZK Regime plus bounds on new physics](https://reader036.fdocuments.in/reader036/viewer/2022062301/5681460d550346895db31c53/html5/thumbnails/7.jpg)
Effective Volume Comments
• Landau, Pomeranchuk, Migdal effect (LPM) makes a difference only to EM showers
• Radio ray bending costs us effective volume. This feature is included here for the first time.
• Separate livetimes must be logged for each threshold setting, reflecting varying background conditions.
![Page 8: RICE bounds on UHE Neutrino fluxes in the GZK Regime plus bounds on new physics](https://reader036.fdocuments.in/reader036/viewer/2022062301/5681460d550346895db31c53/html5/thumbnails/8.jpg)
MC hit distribution with raytracing
![Page 9: RICE bounds on UHE Neutrino fluxes in the GZK Regime plus bounds on new physics](https://reader036.fdocuments.in/reader036/viewer/2022062301/5681460d550346895db31c53/html5/thumbnails/9.jpg)
Transmitter Location Reconstruction
True (known)
Transmitter Depth
![Page 10: RICE bounds on UHE Neutrino fluxes in the GZK Regime plus bounds on new physics](https://reader036.fdocuments.in/reader036/viewer/2022062301/5681460d550346895db31c53/html5/thumbnails/10.jpg)
RICE 2000-2004 ------ live-time Vs. discriminator threshold
![Page 11: RICE bounds on UHE Neutrino fluxes in the GZK Regime plus bounds on new physics](https://reader036.fdocuments.in/reader036/viewer/2022062301/5681460d550346895db31c53/html5/thumbnails/11.jpg)
![Page 12: RICE bounds on UHE Neutrino fluxes in the GZK Regime plus bounds on new physics](https://reader036.fdocuments.in/reader036/viewer/2022062301/5681460d550346895db31c53/html5/thumbnails/12.jpg)
![Page 13: RICE bounds on UHE Neutrino fluxes in the GZK Regime plus bounds on new physics](https://reader036.fdocuments.in/reader036/viewer/2022062301/5681460d550346895db31c53/html5/thumbnails/13.jpg)
Next RICE LIMITS ON
COSMOGENIC FLUXES
![Page 14: RICE bounds on UHE Neutrino fluxes in the GZK Regime plus bounds on new physics](https://reader036.fdocuments.in/reader036/viewer/2022062301/5681460d550346895db31c53/html5/thumbnails/14.jpg)
Cosmogenic Fluxes, Comments:
We choose a wide range of normalizations and several different forms of energy dependence to illustrate the corresponding range of rate expectations.
Each of the cases shown is one out of a span of models (input parameter choices), that each group presents. The large is the largest one in the KKSS study, the medium is the smallest in the PJ study, and the small is the smallest in the ESS study. There is overlap among all of the groups.
![Page 15: RICE bounds on UHE Neutrino fluxes in the GZK Regime plus bounds on new physics](https://reader036.fdocuments.in/reader036/viewer/2022062301/5681460d550346895db31c53/html5/thumbnails/15.jpg)
After ~ 1.5 years livetime, what does RICE see?
NO NEUTRINO EVENTS PASS FINAL CUTS - VERTEX LOCATION AND CONE FIT.
![Page 16: RICE bounds on UHE Neutrino fluxes in the GZK Regime plus bounds on new physics](https://reader036.fdocuments.in/reader036/viewer/2022062301/5681460d550346895db31c53/html5/thumbnails/16.jpg)
Rate Calculations and 95% CL Limits on Cosmogenic Neutrino Fluxes
• All neutrino flavors are included• EM (electron neutrino only) and hadronic showers
included, so CC and NC counted• Improved Monte Carlos of Veff and offline cut
efficiencies reduce nominal acceptance compared to 2000 and 2003 reports
• 2 years more data and lower ‘03 and -’04 backgrounds compensate
• {(Flux)bound = 3x(TxRate)-1modelx(Flux)model }*
* @ 95%CL, where T is the livetime.
![Page 17: RICE bounds on UHE Neutrino fluxes in the GZK Regime plus bounds on new physics](https://reader036.fdocuments.in/reader036/viewer/2022062301/5681460d550346895db31c53/html5/thumbnails/17.jpg)
RICE 2000-2004 ---- SM bound on cosmogenic neutrino flux
![Page 18: RICE bounds on UHE Neutrino fluxes in the GZK Regime plus bounds on new physics](https://reader036.fdocuments.in/reader036/viewer/2022062301/5681460d550346895db31c53/html5/thumbnails/18.jpg)
Next: more limit calculations
LOW SCALE GRAVITY: (LSG) limits on scale
![Page 19: RICE bounds on UHE Neutrino fluxes in the GZK Regime plus bounds on new physics](https://reader036.fdocuments.in/reader036/viewer/2022062301/5681460d550346895db31c53/html5/thumbnails/19.jpg)
Low Scale Gravity Cross Sections
• Need X- sections for BH production : with and without inelasticity (impact parameter effect)
• Need X-cross sections for KK -graviton exchange in eikonal (UNITARY) approximation
• Need shower rates from BH and KK-graviton (eikonal) AND from SM interactions for total rate
• All cross sections rise with energy, as does Veff, while the fluxes fall.
• Rates rely on X-section x Volume x Flux, and the product reveals the most sensitive energy range for a given detector.
![Page 20: RICE bounds on UHE Neutrino fluxes in the GZK Regime plus bounds on new physics](https://reader036.fdocuments.in/reader036/viewer/2022062301/5681460d550346895db31c53/html5/thumbnails/20.jpg)
CROSS SECTIONS PLOTS
![Page 21: RICE bounds on UHE Neutrino fluxes in the GZK Regime plus bounds on new physics](https://reader036.fdocuments.in/reader036/viewer/2022062301/5681460d550346895db31c53/html5/thumbnails/21.jpg)
![Page 22: RICE bounds on UHE Neutrino fluxes in the GZK Regime plus bounds on new physics](https://reader036.fdocuments.in/reader036/viewer/2022062301/5681460d550346895db31c53/html5/thumbnails/22.jpg)
Standard Model
LSG, 1 TeV Scale
LSG, 2 TeV Scale
RICE 2000-2004---- ~ 1.5 years live-time Event Rates From Cosmogenic Neutrinos
![Page 23: RICE bounds on UHE Neutrino fluxes in the GZK Regime plus bounds on new physics](https://reader036.fdocuments.in/reader036/viewer/2022062301/5681460d550346895db31c53/html5/thumbnails/23.jpg)
RICE 2000-2004 ---- bounds on LSG from cosmogenic neutrinos
![Page 24: RICE bounds on UHE Neutrino fluxes in the GZK Regime plus bounds on new physics](https://reader036.fdocuments.in/reader036/viewer/2022062301/5681460d550346895db31c53/html5/thumbnails/24.jpg)
Summary
• RICE has completed a first analysis of all data from 2000 thru 2004
• No neutrino candidates survive all cuts
• Preliminary bounds on representative - “small, medium and large” - GZK, or
COSMOGENIC , flux models• Bounds on Planck mass in 6-d low scale gravity
models via elastic and BH production. Degeneracies confuse the interpretation of data.
![Page 25: RICE bounds on UHE Neutrino fluxes in the GZK Regime plus bounds on new physics](https://reader036.fdocuments.in/reader036/viewer/2022062301/5681460d550346895db31c53/html5/thumbnails/25.jpg)
RICE continuesto determine the
STRONGEST LIMITSfor the energy rangeabove about 1018 eV
![Page 26: RICE bounds on UHE Neutrino fluxes in the GZK Regime plus bounds on new physics](https://reader036.fdocuments.in/reader036/viewer/2022062301/5681460d550346895db31c53/html5/thumbnails/26.jpg)
Conclusions
• the LARGEST cosmogenic flux model on the verge of 2-sigma EXCLUSION
• the INTERMEDIATE and SMALL FLUX models still 101-101.5 below confrontation
• Depending on flux model and on low scale gravity model dependence, lower bounds on the Planck mass range from 1 to 10 TeV.
• Many Interpretations are possible. IT’S STILL EARLY IN THE GAME1
![Page 27: RICE bounds on UHE Neutrino fluxes in the GZK Regime plus bounds on new physics](https://reader036.fdocuments.in/reader036/viewer/2022062301/5681460d550346895db31c53/html5/thumbnails/27.jpg)
RICE 2000-2004 ---- volume with LPM effect
![Page 28: RICE bounds on UHE Neutrino fluxes in the GZK Regime plus bounds on new physics](https://reader036.fdocuments.in/reader036/viewer/2022062301/5681460d550346895db31c53/html5/thumbnails/28.jpg)
RICE 2000-2004 ---- volume without LPM effect
![Page 29: RICE bounds on UHE Neutrino fluxes in the GZK Regime plus bounds on new physics](https://reader036.fdocuments.in/reader036/viewer/2022062301/5681460d550346895db31c53/html5/thumbnails/29.jpg)
RICE---- Volume versus Threshold
![Page 30: RICE bounds on UHE Neutrino fluxes in the GZK Regime plus bounds on new physics](https://reader036.fdocuments.in/reader036/viewer/2022062301/5681460d550346895db31c53/html5/thumbnails/30.jpg)
RICE 2000-2004 ---- SM bound on cosmosgenic neutrino flux
RICE PRELIMINARY
New Limit
![Page 31: RICE bounds on UHE Neutrino fluxes in the GZK Regime plus bounds on new physics](https://reader036.fdocuments.in/reader036/viewer/2022062301/5681460d550346895db31c53/html5/thumbnails/31.jpg)
1. Black holes without inelasticity
CROSS SECTIONS
UNIVERSITY OF KANSASUNIVERSITY OF KANSASD. W. MCKAYD. W. MCKAY
![Page 32: RICE bounds on UHE Neutrino fluxes in the GZK Regime plus bounds on new physics](https://reader036.fdocuments.in/reader036/viewer/2022062301/5681460d550346895db31c53/html5/thumbnails/32.jpg)
2. Black holes with inelasticity
Cross sections continued….
D. W. MCKAYD. W. MCKAY UNIVERSITY OF KANSASUNIVERSITY OF KANSAS
Where,
![Page 33: RICE bounds on UHE Neutrino fluxes in the GZK Regime plus bounds on new physics](https://reader036.fdocuments.in/reader036/viewer/2022062301/5681460d550346895db31c53/html5/thumbnails/33.jpg)
Graviton exchange
Cross sections continued….
D. W. MCKAYD. W. MCKAY UNIVERSITY OF KANSASUNIVERSITY OF KANSAS
n
c
b
bbs ⎟
⎠
⎞⎜⎝
⎛=),(χ
![Page 34: RICE bounds on UHE Neutrino fluxes in the GZK Regime plus bounds on new physics](https://reader036.fdocuments.in/reader036/viewer/2022062301/5681460d550346895db31c53/html5/thumbnails/34.jpg)
Graviton exchange continued…
Cross sections continued….
D. W. MCKAYD. W. MCKAY UNIVERSITY OF KANSASUNIVERSITY OF KANSAS
![Page 35: RICE bounds on UHE Neutrino fluxes in the GZK Regime plus bounds on new physics](https://reader036.fdocuments.in/reader036/viewer/2022062301/5681460d550346895db31c53/html5/thumbnails/35.jpg)
Showers from BHD
Shower rates continued….
D. W. MCKAYD. W. MCKAY UNIVERSITY OF KANSASUNIVERSITY OF KANSAS
![Page 36: RICE bounds on UHE Neutrino fluxes in the GZK Regime plus bounds on new physics](https://reader036.fdocuments.in/reader036/viewer/2022062301/5681460d550346895db31c53/html5/thumbnails/36.jpg)
Shower rates continued….
D. W. MCKAYD. W. MCKAY UNIVERSITY OF KANSASUNIVERSITY OF KANSAS
Showers from graviton exchange