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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

slide60

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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