Solar Neutrino and Solar Neutrino and Neutrino Physics in Brazil - - PowerPoint PPT Presentation

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Solar Neutrino and Solar Neutrino and Neutrino Physics in Brazil - - PowerPoint PPT Presentation

Oct 12, 2022 357 likes •775 views

Solar Neutrino and Solar Neutrino and Neutrino Physics in Brazil Neutrino Physics in Brazil Pedro Cunha de Holanda DRCC - IFGW UNICAMP Florence, 2012 A little bit of history A little bit of history A little bit of history A little bit of

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Solar Neutrino and Neutrino Physics in Brazil Solar Neutrino and Neutrino Physics in Brazil

Pedro Cunha de Holanda DRCC - IFGW UNICAMP

Florence, 2012

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A little bit of history A little bit of history

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A little bit of history A little bit of history my

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A little bit of history A little bit of history

➔ Pontecorvo: Solar Neutrinos, maybe we can detect them, maybe the

flux will agree with solar model predictions, and if they don't agree, maybe the neutrinos are oscillating.

➔ Davis: First solar neutrino detection at Homestake. ➔ Ok, but oscillation is not a good mechanism, because it only works

for large mixing angles.

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A little bit of history A little bit of history

➔ Pontecorvo: Solar Neutrinos, maybe we can detect them, maybe the

flux will agree with solar model predictions, and if they don't agree, maybe the neutrinos are oscillating.

➔ Davis: First solar neutrino detection at Homestake. ➔ Ok, but oscillation is not a good mechanism, because it only works

for large mixing angles. But there are matter effects!

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A little bit of history A little bit of history

➔ Pontecorvo: Solar Neutrinos, maybe we can detect them, maybe the

flux will agree with solar model predictions, and if they don't agree, maybe the neutrinos are oscillating.

➔ Davis: First solar neutrino detection at Homestake. ➔ Ok, but oscillation is not a good mechanism, because it only works

for large mixing angles. But there are matter effects!

➔ No good, matter effects are diagonal in evolution matrix, and then

decrease oscillation signal.

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A little bit of history A little bit of history

➔ Pontecorvo: Solar Neutrinos, maybe we can detect them, maybe the

flux will agree with solar model predictions, and if they don't agree, maybe the neutrinos are oscillating.

➔ Davis: First solar neutrino detection at Homestake. ➔ Ok, but oscillation is not a good mechanism, because it only works

for large mixing angles. But there are matter effects!

➔ No good, matter effects are diagonal in evolution matrix, and then

decrease oscillation signal. MSW mechanism enhance conversion even for very small mixing angles!

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A little bit of history A little bit of history

Year: 1998 Data:

  • Homestake, total rate
  • Gallex and Sage, total rate
  • Super-Kamiokande I (504 days),

rates, day-night assymetry, spectrum. Solutions:

  • SMA
  • oscillation in vacuum

Bahcall, Krastev and Smirnov, Phys.Rev.D58(1998)096016.

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A little bit of history A little bit of history

Year: 1999 Data:

  • Homestake, total rate
  • Gallex and Sage, total rate
  • Super-Kamiokande I (708 days),

rates, day-night assymetry, spectrum information. Solutions:

  • LMA?

Bahcall, Krastev and Smirnov, Phys.Rev.D60(1999)093001.

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A little bit of history A little bit of history

  • M. C. Gonzalez-Garcia, PCH, C. Peña-Garay and J.W.F. Valle

Nucl.Phys.B573(2000), 3-26.

Year: 2000 Data:

  • Homestake, total rate
  • Gallex and Sage, total rate
  • Super-Kamiokande I (825 days),

rates, zenith angle distribution, spectrum and seasonal variation. Solutions:

  • SMA, LOW, LMA
  • oscillation in vacuum
  • RSFP
  • NSNI
  • VEP
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A little bit of history A little bit of history

A.M. Gago, M.M. Guzzo, PCH, H. Nunokawa, O.L.G. Peres, V. Pleitez, R. Zukanovich Funchal, Phys.Rev.D65 (2001), 073012..

Year: 2002 Data:

  • Homestake, total rate
  • Gallex, GNO and Sage, total rate
  • Super-Kamiokande, rates, zenith

angle distribution, spectrum and seasonal variation.

  • SNO, charged current

Solutions:

  • LOW, LMA
  • oscillation in vacuum
  • RSFP
  • NSNI
  • VEP
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A little bit of history A little bit of history

A.M. Gago, M.M. Guzzo, PCH, H. Nunokawa, O.L.G. Peres, V. Pleitez, R. Zukanovich Funchal, Phys.Rev.D65 (2001), 073012..

Year: 2002 Data:

  • Homestake, total rate
  • Gallex, GNO and Sage, total rate
  • Super-Kamiokande, rates, zenith

angle distribution, spectrum and seasonal variation.

  • SNO, charged current

Solutions:

  • LOW, LMA
  • oscillation in vacuum
  • RSFP
  • NSNI
  • VEP
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A little bit of history A little bit of history

Year: 2002 Data:

  • Homestake, total rate
  • Gallex, GNO and Sage, total rate
  • Super-Kamiokande, rates, zenith

angle distribution, spectrum and seasonal variation.

  • SNO, charged current

Solutions:

  • LOW, LMA
  • oscillation in vacuum
  • RSFP
  • NSNI
  • VEP
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A little bit of history A little bit of history

PCH, A. Yu. Smirnov, JCAP 02 (2003) 001.

Year: 2003 Data:

  • Homestake, total rate
  • Gallex, GNO and Sage, total rate
  • Super-Kamiokande, rates, zenith

angle distribution, spectrum and seasonal variation.

  • SNO, charged current day-night

spectrum

  • KamLAND, spectrum

Solutions:

  • LMA
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A little bit of history A little bit of history

PCH, A. Yu. Smirnov, JCAP 02 (2003) 001.

Linear scale! Year: 2003 Data:

  • Homestake, total rate
  • Gallex, GNO and Sage, total rate
  • Super-Kamiokande, rates, zenith

angle distribution, spectrum and seasonal variation.

  • SNO, charged current day-night

spectrum

  • KamLAND, spectrum

Solutions:

  • LMA
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A little bit of history A little bit of history

PCH, A. Yu. Smirnov, Astropart.Phys.21 (2004) 287..

Year: 2004 Data:

  • Homestake, total rate
  • Gallex, GNO and Sage, total rate
  • Super-Kamiokande, rates, zenith

angle distribution, spectrum and seasonal variation.

  • SNO, charged current day-night

spectrum, NC and ES rates.

  • KamLAND, spectrum

Solutions:

  • LMA

Linear scale!

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A little bit of history A little bit of history

G.A.Valdiviesso, M.M. Guzzo, PCH, Phys.Lett. B (2011) 240.

Year: 2011 Data:

  • Homestake, total rate
  • Gallex, GNO and Sage, total rate
  • Super-Kamiokande, rates, zenith

angle distribution, spectrum and seasonal variation.

  • SNO, CC, NC and ES day-night

spectrum, all fases

  • Borexino.
  • KamLAND, spectrum

Solutions:

  • LMA
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MSW-LMA: robust solution MSW-LMA: robust solution

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Solar neutrino experiments

  • latest data -

Solar neutrino experiments

  • latest data -
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Super-Kamiokande IV

Smy, Neutrino 2012

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Super-Kamiokande IV

Smy, Neutrino 2012

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Super-Kamiokande IV

Smy, Neutrino 2012

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Sudbury Neutrino Observatory, I & II

SNO Collaboration, Phys.Rev.C81:055504,2010

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Sudbury Neutrino Observatory, I & II

SNO Collaboration, Phys.Rev.C81:055504,2010

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Sudbury Neutrino Observatory, I & II

SNO Collaboration, ArXiV:1109.0763

➔ Test of spectral distortion following a SNO prescription through

expansion of survival probability: and correlations between coeficients:

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Sudbury Neutrino Observatory, I & II

McDonald talk, Neutrino 2012

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Borexino, measurement of 8B flux

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Borexino

PLUS:

➔ Measurement of 7Be neutrino flux, and absence of day-night variation (exluding

LOW solution and a particular exotic scenario)

➔ Measurement of pep neutrinos.

PCH, JCAP07(2009)024 Borexino Coll. Phys.Rev.Lett.107(20011)141302

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Putting everything together Putting everything together

Smy talk, Neutrino 2012 McDonald talk, Neutrino 2012

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New physics related to “tension” between solar and KamLAND prefered mass scale New physics related to “tension” between solar and KamLAND prefered mass scale

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You're are not suppose to name it. Once you name it, you start getting attached to it!

New physics related to “tension” between solar and KamLAND prefered mass scale New physics related to “tension” between solar and KamLAND prefered mass scale

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New physics related to “tension” between solar and KamLAND prefered mass scale New physics related to “tension” between solar and KamLAND prefered mass scale

  • 4th (sterile) neutrino with low mass.
  • MaVaN's, NSNI, magnetic moment...

PCH and A. Yu. Smirnov, Phys.Rev.D83 (2001)113011

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Smirnov and Brazil Smirnov and Brazil

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Smirnov and Brazil Smirnov and Brazil

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Smirnov and Brazil Smirnov and Brazil

➔ Quite a strong group of people talking about neutrino physics. ➔ From this group, Alexei Smirnov collaborated with Orlando Peres

(Unicamp), myself (Unicamp) and Renata Zukanovich Funchal (USP).

➔To put some numbers, in 15 years we can count from direct collaboration

with Alexei Smirnov, 14 papers on neutrino phenomenology, involving solar, atmospheric, and reactor neutrinos.

➔ And hopefully, the collaboration continues!

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Smirnov and Brazil Smirnov and Brazil

➔ Quite a strong group of people talking about neutrino physics. ➔ From this group, Alexei Smirnov collaborated with Orlando Peres

(Unicamp), myself (Unicamp) and Renata Zukanovich Funchal (USP).

➔To put some numbers, in 15 years we can count from direct collaboration

with Alexei Smirnov, 14 papers on neutrino phenomenology, involving solar, atmospheric, and reactor neutrinos.

➔ And hopefully, the collaboration continues!

Thank you, Alexei!