Recent results from miniboone and sciboone
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Recent Results from MiniBooNE and SciBooNE. Sam Zeller LANL FNAL Users Meeting June 3, 2009. will be telling you what’s new on the Booster  beamline at FNAL. Booster  Experiments. SciBooNE. to remind you of your friends on other side of the ring …

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Recent results from miniboone and sciboone

Recent Results fromMiniBooNE and SciBooNE

Sam Zeller

LANL

FNAL Users Meeting

June 3, 2009

  • will be telling you what’s new on the Booster beamline at FNAL


Booster experiments

Booster  Experiments

SciBooNE

  • to remind you of your

  • friends on other side

  • of the ring …

  • two  experiments make use

  • of 8 GeV Booster beam


Booster experiments1

Booster  Experiments

MiniBooNE

SciBooNE

  • Cerenkov detector (CH2)

  • main goal is to study  oscillations

  • recently added a host of new  meas

- NIM A599, 28 (2009) -


Booster experiments2

Booster  Experiments

MiniBooNE

SciBooNE

  • start: August 2002

  • - 6.9 x1020 POT 

  • - 5.1 x1020 POT 

  • currently running mode

  • recently approved for

  • extended running (+5x1020 POT)

already surpassed our goal

- thank you FNAL AD! -

- NIM A599, 28 (2009) -


Booster experiments3

Booster  Experiments

SciBooNE

SciBooNE

  • fine-grained tracking detector (CH)

  • (DOE-wide Pollution Prevention P2 Star Award)

  • main goal is dedicated (~ 1 GeV, T2K)

  • also serves as ND for MiniBooNE

(shipped

from Japan)


Booster experiments4

Booster  Experiments

SciBooNE

SciBooNE

  • start: June 2007

  • - 0.99 x1020 POT 

  • - 1.53 x1020 POT 

  • completed run Aug 2008

  • detectors decommissioned

25% more data than requested

- thank you FNAL AD! -

(shipped

from Japan)


Booster experiments5

Booster  Experiments

SciBooNE

SciBooNE

  • start: June 2007

  • - 0.99 x1020 POT 

  • - 1.53 x1020 POT 

  • completed run Aug 2008

  • detectors decommissioned

  • impressive timeline

  • 3 years from formation to first result!

(shipped

from Japan)


Outline

Outline

  • will go through some of recent results from two experiments

  • (a lot has happened in the past year!)

  •  oscillation results

  • from MiniBooNE in past year

  • brand new  measurements

  • from both MiniBooNE & SciBooNE

briefly summarize

three  oscillation

updates from MB


Miniboone oscillations

MiniBooNE Oscillations

 e analysis

  • 1st, re-analysis of  mode

  • - review of bkg estimates

  • - extension down to 200 MeV

  • - increased stats

  • FNAL W&C August 2008

 mode 6.5x1020 POT

- PRL 102, 101802 (2009) -


Miniboone oscillations1

MiniBooNE Oscillations

 e analysis

  • 1st, re-analysis of  mode

  • - review of bkg estimates

  • - extension down to 200 MeV

  • - increased stats

  • FNAL W&C August 2008

 mode 6.5x1020 POT

> 475 MeV:unchanged

no LSND-like oscillations (2)

- PRL 102, 101802 (2009) -


Miniboone oscillations2

MiniBooNE Oscillations

 e analysis

  • 1st, re-analysis of  mode

  • - review of bkg estimates

  • - extension down to 200 MeV

  • - increased stats

  • FNAL W&C August 2008

 mode 6.5x1020 POT

> 475 MeV:unchanged

no LSND-like oscillations (2)

< 475 MeV: low energy

excess persists (3 200-475 MeV)

- PRL 102, 101802 (2009) -


Miniboone oscillations3

MiniBooNE Oscillations

 e analysis

(G. Karagiorgi)

  • 1st look at  mode data

  • unblinded in Nov 2008

  • statistics are low

  • - no statement on LSND yet

  • no low energy excess?!

  • working on combined / 

  • + will benefit from more stats

 mode 3.4x1020 POT

FNAL W&C December 2008

- arXiv:0904:1958 [hep-ex] -


Miniboone oscillations4

MiniBooNE Oscillations

 e analysis

(G. Karagiorgi)

  • 1st look at  mode data

  • unblinded in Nov 2008

  • statistics are low

  • - no statement on LSND yet

  • no low energy excess?!

  • working on combined / 

  • + will benefit from more stats

 mode 3.4x1020 POT

FNAL W&C December 2008

we’ll have to see

how this picture evolves

- arXiv:0904:1958 [hep-ex] -


Miniboone oscillations5

MiniBooNE Oscillations

(K. Mahn)

also performed search for

and  disappearance

 mode

  • set limits

  • carving out new regions

  • of parameter space

  • update incorporating SciBooNE

  • data is currently underway

  • (which should help further improve limits)

FNAL W&C October 2008

 mode

- arXiv:0903:2465 [hep-ex] -


Outline1

Outline

  • now let’s switch gears …

  •  oscillation results

  • from MiniBooNE in past year

  • brand new  measurements

  • from both MiniBooNE & SciBooNE

  • rest of talk

  • all results <2 weeks

  • old! (NuInt09)

  • - a lot of firsts

  • (as you’ll see)


Neutrino cross sections

Neutrino Cross Sections

  • of critical importance to

  • future  oscillation exps

  • which will be operating

  • in this few-GeV E range

CNGS

NOvA

T2K

DUSEL


Neutrino cross sections1

Neutrino Cross Sections

  • of critical importance to

  • future  oscillation exps

  • which will be operating

  • in this few-GeV E range

quasi-elastic (QE)

signal

CNGS

NOvA

T2K

DUSEL


Neutrino cross sections2

Neutrino Cross Sections

  • of critical importance to

  • future  oscillation exps

  • which will be operating

  • in this few-GeV E range

NC 0

(background to

e appearance)

CC +

(background to

 disappearance)

CNGS

NOvA

T2K

DUSEL


Neutrino cross sections3

Neutrino Cross Sections

  • of critical importance to

  • future  oscillation exps

  • which will be operating

  • in this few-GeV E range

  • data are 20-30 years old

  • - 100’s of events,mostly D2

  • - calcs we use are also old

  • situation have been suffering

  • with for past 30+ years

  • rapidly improving

  • (in large part due to efforts at FNAL)

CNGS

NOvA

T2K

DUSEL


Neutrino cross sections4

Neutrino Cross Sections

  • of critical importance to

  • future  oscillation exps

  • which will be operating

  • in this few-GeV E range

  • data are 20-30 years old

  • - 100’s of events,mostly D2

  • - calcs we use are also old

  • situation have been suffering

  • with for past 30+ years

  • rapidly improving

  • (in large part due to efforts at FNAL)

MB, SB

nuclear targets!

MINOS, MINERA


Neutrino cross sections5

Neutrino Cross Sections

  • of critical importance to

  • future  oscillation exps

  • which will be operating

  • in this few-GeV E range

  • data are 20-30 years old

  • - 100’s of events,mostly D2

  • - calcs we use are also old

  • situation have been suffering

  • with for past 30+ years

  • rapidly improving

  • (in large part due to efforts at FNAL)

MB, SB

next talk!

MINOS, MINERA


Neutrino cross sections6

Neutrino Cross Sections

  • of critical importance to

  • future  oscillation exps

  • which will be operating

  • in this few-GeV E range

  • data are 20-30 years old

  • - 100’s of events,mostly D2

  • - calcs we use are also old

  • situation have been suffering

  • with for past 30+ years

  • rapidly improving

  • (in large part due to efforts at FNAL)

MB, SB

next talk!

this talk

MINOS, MINERA


Booster flux predictions

Booster  Flux Predictions

  • make heavy use of pBe  

  • data from HARP experiment

  • - Eur. Phys. J. C52, 29 (2007) -

  • - 8.9 GeV/c protons

  • - exact replica target (5% )

  • caliber of data helped greatly

  • reduce  flux uncertainties

  • comprehensive  flux paper

  • - PRD 79, 072002 (2009) -

(D. Schmitz)


Booster flux predictions1

Booster  Flux Predictions

  • make heavy use of pBe  

  • data from HARP experiment

  • - Eur. Phys. J. C52, 29 (2007) -

  • - 8.9 GeV/c protons

  • - exact replica target (5% )

unable to reliably extract

 measurements

without this important input

  • caliber of data helped greatly

  • reduce  flux uncertainties

  • comprehensive  flux paper

  • - PRD 79, 072002 (2009) -

(D. Schmitz)


Elastic scattering processes



W+

n

n,p

n,p

Elastic Scattering Processes

  • CC QE scattering

  • NC elastic scattering

  • let’s start on the left and work our way up in energy …


Quasi elastic scattering





W+

W+

n

n

n,p

n,p

n,p

n,p

Quasi-Elastic Scattering

  • CC QE scattering

  • NC elastic scattering

  • CC QE scattering

  • NC elastic scattering

  • “golden channel” (signal sample)

  • - cross section = # of signal events

  • - kinematics = looking for effects as function E

  •  experiments typically simulate with

  • relativistic Fermi Gas model (RFG)

  • Smith and Moniz, NP B43, 605 (1972)


Quasi elastic scattering1



W+

n

n,p

n,p

Quasi-Elastic Scattering

MiniBooNE:

  • CC QE scattering

  • NC elastic scattering

  • reconstruct muon (T,)

  • advantage of SB: can reconstruct both  and p


Quasi elastic scattering2



W+

n

cos

T (GeV)

n,p

n,p

Quasi-Elastic Scattering

MiniBooNE:

  • CC QE scattering

  • NC elastic scattering

(T. Katori)

d2

dTdcos

  • 146,070  QE events (76% purity, 27% )

  • provide most complete information on

  •  QE scattering to date (full  kinematics)


Quasi elastic scattering3



W+

n

cos

T (GeV)

n,p

n,p

Quasi-Elastic Scattering

MiniBooNE:

  • CC QE scattering

  • NC elastic scattering

(T. Katori)

d2

dTdcos

first measurement of

double diff’l cross section

in  QE scattering!

  • 146,070  QE events (76% purity, 27% )

  • provide most complete information on

  •  QE scattering to date (full  kinematics)


Quasi elastic scattering4



W+

n

n,p

n,p

Quasi-Elastic Scattering

MiniBooNE:

(T. Katori)

  • CC QE scattering

  • NC elastic scattering

  • updated shape fit results: MA=1.35  0.17 GeV

  • 

  • (with improved background constraint from MB data)


Quasi elastic scattering5



W+

n

n,p

n,p

Quasi-Elastic Scattering

MiniBooNE:

(T. Katori)

  • CC QE scattering

  • NC elastic scattering

  • updated shape fit results: MA=1.35  0.17 GeV

> MAD2=1.03 GeV, but consistent w/ K2K, MINOS


Quasi elastic scattering6



W+

n

n,p

n,p

Quasi-Elastic Scattering

MiniBooNE:

  • CC QE scattering

  • NC elastic scattering

(T. Katori)

RFG model with MA=1.35 GeV

RFG model with MA=1.03 GeV (D2)

(most widely used prediction for this process)

  • 35% higher than RFG w/ world avg MA=1.03 GeV

  • in better agreement with RFG w/ params

  • coming from shape only fit (MA=1.35 GeV)


Quasi elastic scattering7



W+

n

n,p

n,p

Quasi-Elastic Scattering

SciBooNE:

can clearly resolve final state

  • CC QE scattering

  • NC elastic scattering

μ

p

  • reconstruct both and proton (2 track analysis)

  • 2,680  QE events (69% purity, 2.3% )


Quasi elastic scattering8



W+

n

n,p

n,p

Quasi-Elastic Scattering

SciBooNE:

  • CC QE scattering

  • NC elastic scattering

(J. Alcaraz)

preliminary

  • agrees with RFG prediction (with a higher MA)

  • ~ consistent with MiniBooNE measurement


Quasi elastic scattering9



W+

n

n,p

n,p

Quasi-Elastic Scattering

SciBooNE:

  • CC QE scattering

  • NC elastic scattering

(J. Alcaraz)

preliminary

final results

this summer!

  • agrees with RFG prediction (with a higher MA)

  • ~ consistent with MiniBooNE measurement


Current situation

Current Situation

preliminary

(T. Katori)

RFG with MA=1.35 GeV

RFG with MA=1.03 GeV

MiniBooNE with total error

NOMAD with total error (arXiv:0812.4543)

SciBooNE with preliminary errors

  • MiniBooNE and SciBooNEin good agreement

  • 1st meas on nuclear target at low energy (E< 2 GeV)

  • both higher than recent QE from NOMAD?! all three on 12C

~


Current situation1

Current Situation

preliminary

(T. Katori)

RFG with MA=1.35 GeV

RFG with MA=1.03 GeV

MINOS, MINERA

  • importance of NuMI data (MINOS ND, MINERA)!

  • FNAL exps will make the defining statement on this 

  • (in doing so, will populate plot better than has ever been done in history)


Current situation2

Current Situation

preliminary

(T. Katori)

RFG with MA=1.35 GeV

RFG with MA=1.03 GeV

look forward to seeing

how this turns out

MINOS, MINERA

  • importance of NuMI data (MINOS ND, MINERA)!

  • FNAL exps will make the defining statement on this 

  • (in doing so, will populate plot better than has ever been done in history)


Nc elastic scattering



W+

n

n,p

n,p

NC Elastic Scattering

  • CC QE scattering

  • NC elastic scattering

  • can study NC counterpart of this reaction

  • (MA, eventuallys)

  • MiniBooNE: 94,500  NC EL events

  • (65% purity, 26% )

  • using this high quality data …


Nc elastic scattering1



W+

n

n,p

n,p

NC Elastic Scattering

MiniBooNE:

(D. Perevalov)

  • CC QE scattering

  • NC elastic scattering

  • in agreement w/ BNL E734 (1987); both on 12C

  • first to extend reach below Q2<0.4 GeV2


Nc elastic scattering2



W+

n

n,p

n,p

NC Elastic Scattering

SciBooNE:

(H. Takei)

  • CC QE scattering

  • NC elastic scattering

(stat errors only)

preliminary

  • adding important new data; also on 12C

  • 8,441  NC EL events (57% purity)


Single production



0

+

W+

n,p

n,p

n,p

n,p

Single  Production

  • NC 0 production

  • CC + production

  • have both NC and CC counterpart


Nc 0 production



0

+

W+

n,p

n,p

n,p

n,p

M(GeV)

NC 0 Production

  • NC 0 production

  • CC + production

  • background to  e searches, 13

  • final state can mimic a e interaction, 0 

  • very little historical data on this channel

  • cross section =

  • # of bkg events

GGM, 240 NC 0 events

Nucl. Phys. B135, 45 (1978)


Nc 0 production1



0

+

W+

n,p

n,p

n,p

n,p

NC 0 Production

MiniBooNE:

  • NC 0 production

  • CC + production

0

world’s largest sample of NC 0 events

(important constraint for e)

21,542  NC 0 events (73% purity, 36% )

2,305  NC 0 events (58% purity, 36% )


Nc 0 production2



0

+

W+

n,p

n,p

n,p

n,p

NC 0 Production

MiniBooNE:

(C. Anderson)

  • NC 0 production

  • CC + production

  • absolutely normalized ( mode NC 0 data/MC = 1.10)

  • not so useful outside MB, so …


Nc 0 production3



0

+

W+

cos

p(GeV)

n,p

n,p

n,p

n,p

cos

p(GeV)

NC 0 Production

MiniBooNE:

(C. Anderson)

  • NC 0 production

  • CC + production


Nc 0 production4



0

+

W+

cos

p(GeV)

n,p

n,p

n,p

n,p

cos

p(GeV)

NC 0 Production

MiniBooNE:

(C. Anderson)

  • NC 0 production

  • CC + production

first measurement

of absolute NC 0 diff’l

cross section


Nc 0 production5



0

+

W+

n,p

n,p

n,p

n,p

NC 0 Production

SciBooNE:

this is what a 0 event looks like in SB

  • NC 0 production

  • CC + production

0

  • 545  NC 0 events (63% purity)


Nc 0 production6



0

+

W+

n,p

n,p

n,p

n,p

NC 0 Production

SciBooNE:

(Y. Kurimoto)

  • NC 0 production

  • CC + production

preliminary

(NC 0)

(CC inclusive)

= 7.7 ±0.6(stat) ±0.6(prelim syst) x10-2

  • agrees with NEUT (6.8x10-2), K2K (6.40.7x10-2)


Cc production



0

+

W+

n,p

n,p

n,p

n,p

CC + Production

  • NC 0 production

  • CC + production

  • background to  disappearance

  • - + absorption = missing E = mis-estimate E

  • can spoil  disappearance signal

  • future experiments must know CC +

  • fraction to a few-% to measure m223,23

  • (example: 5-10% is quoted goal for T2K)

  • want to know cross section as fcn E


Cc production1



0

+

W+

n,p

n,p

n,p

n,p

CC + Production

  • NC 0 production

  • CC + production

(S. Linden)

CC +/QE  ratio

this has been

state of the art

ANL: Phys. Rev. D25, 1161 (1982), deuterium


Cc production2



0

+

W+

n,p

n,p

n,p

n,p

CC + Production

  • NC 0 production

  • CC + production

(S. Linden)

CC +/QE  ratio

26 years

later …

K2K: Phys. Rev. D78, 032003 (2008), carbon


Cc production3



0

+

W+

n,p

n,p

n,p

n,p

CC + Production

  • NC 0 production

  • CC + production

(S. Linden)

CC +/QE  ratio

paper

submitted

last month

MiniBooNE: arXiv:0904.3159 [hep-ex], carbon


Cc production4



0

+

W+

n,p

n,p

n,p

n,p

CC + Production

MiniBooNE:

(M. Wilking)

  • NC 0 production

  • CC + production

v

  • developed new  + + fitter (a first for C)

  • correctly identify , + 88% of time

  • 48,000 CC + events (90% purity)


Cc production5



0

+

W+

n,p

n,p

n,p

n,p

CC + Production

MiniBooNE:

(M. Wilking)

  • NC 0 production

  • CC + production

  • measured 8 different cross sections:

(E), d/dQ2, d2/dTd, d/dT, d/d,

d/dT, d/dd2/dTd


Cc production6



0

+

W+

n,p

n,p

n,p

n,p

CC + Production

MiniBooNE:

(M. Wilking)

  • NC 0 production

  • CC + production

first measurements

of absolute CC +

diff’l cross sections

  • measured 8 different cross sections:

(E), d/dQ2, d2/dTd, d/dT, d/d,

d/dT, d/dd2/dTd


Cc production7



0

+

W+

n,p

n,p

n,p

n,p

CC + Production

SciBooNE:

has probed this interaction even further

  • NC 0 production

  • CC + production

+



+



rare

  • two ways can be produced

  • SB can isolate coherent mode of production

  • search for events with small vertex activity

  • can’t be done on MiniBooNE


Cc production8



0

+

W+

n,p

n,p

n,p

n,p

CC + Production

SciBooNE:

(K. Hiraide)

  • NC 0 production

  • CC + production

coherent 

prediction

SciBooNE

PRD 78, 112004 (2008)

  • first physics publication from SciBooNE

  • updated analysis currently underway

  • (expanded kinematic search, both and )

FNAL W&C November 2008


Cc production9



0

+

W+

n,p

n,p

n,p

n,p

CC + Production

SciBooNE:

(K. Hiraide)

  • NC 0 production

  • CC + production

coherent 

prediction

SciBooNE

PRD 78, 112004 (2008)

stay tuned!

  • first physics publication from SciBooNE

  • updated analysis currently underway

  • (expanded kinematic search, both and )

FNAL W&C November 2008


Recent results from miniboone and sciboone

neutrino results

to recap:

CC +/QE  ratio in E

 CC QE d2/dTd

(T. Katori) d/dQ2, (E)

 NC EL d/dQ2

(D. Perevalov)

 CC +

(M. Wilking)

,  NC 0

(C. Anderson)

 CC QE (E)

(J. Alcaraz)

 NC EL d/dTN

(H. Takei)

,  CC + coherent + 

(K. Hiraide, H. Tanaka)

 NC 0 (NC0)/(CC)

(Y. Kurimoto)

(S. Linden, J. Nowak)

MiniBooNE

(2002-2009)

d/dT, d/dd2/dTd

d/dT, d/d, d2/dTd

d/dQ2, (E)

many firsts!

d/dp

d/d

SciBooNE

(2007-2009)


Recent publications

Recent Publications

  • since 2008, MB has published/submitted 10 papers

  • - “Measurement of CC +/QE  Ratio on CH2 in a 0.8 GeV Beam”, arXiv:0904.3159, submitted to PRL

  • - “A Search for e Appearance at the m2~1 eV2 Scale”, arXiv:0904.1958, submitted to PRL

  • - “A Search for  and  Disappearance in MiniBooNE”, arXiv:0-903.2465, submitted to PRL

  • - “Unexplained Excess of Electron-Like Events from a 1 GeV  Beam”, PRL 102, 101802 (2009)

  • - “1st Measurement of ,e Events in Off-Axis Horn-Focused  Beam”, PRL 102, 211801 (2009)

  • - “The MiniBooNE Detector”, NIM A599, 28 (2009)

  • - “The  Flux Prediction at MiniBooNE”, PRD 79, 072002 (2009)

  • - “Compatibility of High m2e and e Oscillation Searches”, PRD 78, 012007 (2008)

  • - “1st Observation of Coherent 0 Production in -Nucleus Interactions with E<2 GeV”, PL B664, 41 (2008)

  • - “Measurement of  Quasi-Elastic Scattering on Carbon”, PRL 100, 032301 (2008)

  • - graduated 6 PhD students (more to come!)

  • SB published 1st physics paper 4 months after 1 year run

  • - “Search for CC Coherent + Production on Carbon in a Few-GeV  Beam”, PRD 78, 112004 (2008)

  • - plus many conference proceedings

  • - graduated 3 PhD students (more to come!)


Conclusions

Conclusions

  • both collaborations have been extremely active in past year

  • MiniBooNE released 3 new neutrino

  • oscillation results (& associated publications)

  • both MiniBooNE and SciBooNE

  • have a flood of new low energy

  •  measurements (E<2 GeV)

  • - important for  oscillation exps

  • - Fermilab poised to dramatically

  • change current landscape & our

  • understanding of  interactions:

  • - MiniBooNE, SciBooNE … Booster ’s

  • - MINOS, MINERA … MI ’s

  • can look forward to even more to come!


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