# Presentation: 851523

## Physics - Detector Optimization StudiesNuInt05 Highlights

- Jorge G. Morfín
- Fermilab

## T.J. Sarlina

- (1)  It’s a way of determining the basic function of an item.
- (2)  It’s a way of evaluating high cost areas and systematically reducing those costs.
- (3)  It’s a way of analyzing a problem area and developing alternative ways of resolving the problem.
- (4)  It’s a way of selecting the best possible alternative to perform the basic function at the lowest cost.  Value Engineering thus extends financial, manpower, and material resources.

## Value Management (VM) principles are essential to proper program management and have been incorporated from the early design and development stages of the technical requirements.  These principles have also been employed as the cost and schedule parameters matured over time.  Use of the VM approach provides a systematic framework to analyze the functions of systems, equipment, facilities, services, and supplies for the purpose of achieving the essential functions at the lowest life cycle cost consistent with required performance, quality, reliability and safety.  VM elements have been incorporated as a part of each of the technical and program reviews to date.

## VM Examples

- Anything with 2 or more vendor quotes
- Reuse of existing materials
- Determining physics drivers for nuclear targets
- PMT’s on top or bottom
- Need for a Coil
- Granularity - size of triangles
- Off-the-shelf purchase vs custom equipment

## What this means for us....

- Short concise document for each physics-channel study containing:
- Description of physics goals
- What components of detector used in the analysis
- Technical requirements/detector response to meet the physics goals
- Description of how detector response depends on design modifications
- Description of how physics results depend on design modifications

## Coherent Pion Production MINERA:  85 K CC / 37 K NC: CH and 25 K (50K) CC / 13 K (25K)NC: Fe (Pb)H. Gallagher

- Selection criteria reduce the signal by a factor of three - while reducing the background by a factor of ≈ 1000.

- signal

- Selection criteria discussed at
- previous meeting

## Expected MINERA Results - Coherent Production

- Rein-Seghal

- Paschos-
- Kartavtsev

**Expected MiniBooNe **
**and K2K measurements**

- Errors now include estimated background subtraction

- MinerA

**MINER********A’s nuclear targets allow the**
**first measurement of the A-dependence**
**of ********coh**** across a wide A range**

## Coherent production: Changing strip size

- I have run my coherent code with new resolutions based on the changes
- mentioned here.  If I understand correctly, in trial (1) I should be
- degrading the angular resolution by 4% and in trial (2) I should be
- improving it by 3%.  I have taken the nominal smearing to be 0.5 degrees
- so these would give 0.52 deg and 0.485 deg respectively.  I am really
- surprised that the angular resolution changes so little for such large
- changes in the strip size.
- Degradation at this level has essentially zero impact on the coherent
- analysis as far as I can tell.  The changes I get in the number of events
- passing cuts where I have smeared the reconstruction using these new
- numbers is on the same order as the statistical uncertainty in the MC
- sample I have handy, which is around 2.5%.

## Recent K2K SciBar ResultM. Hasegawa et al. - hep - ex/0506008

- Expect 470 CC coherent events according to Rein-Sehgal
- Find 7.6 ± 50.4

## MINERA CC Quasi-Elastic MeasurementsFully simulated analysis, - realistic detector simulation and reconstruction

- Average: eff. = 74 % and purity = 77%

**Expected MiniBooNE **
**and K2K measurements**

- Quasi-elastic ( + n --> + p, around **800 K events**)
- Precision measurement of E) and d/dQ important for neutrino oscillation studies.
- Precision determination of axial vector form factor (FA), particularly at high Q2
- Study of proton intra-nuclear scattering and their A-dependence (C, Fe and Pb targets)

## Lar TPC: Evt 3: QUASI ELASTIC (2.5%)

***Proton K.E. dominated by ***
***the requirements***
***K.E.****** > ******50 MeV***
***Full containment****** ***

- 61 events -
- 73 expected from MC

## NOMAD: The sleeping giant wakes...slowly

## NOMAD: Staatistics and Physics program

## NOMAD: QE event

## NOMAD: QE result

## Resonance Production - S. Wood and M. Paschos

- Total Cross-section and d/dQ2 for the ++ assuming 50% detection efficiency
- Errors are statistical only: 175K ++

- T

## MiniBooNe:  CC+ Measurement

## Nuclear Effects MINERA: 2.8 M events off CH, 600 K off C and 1 M events off of Fe and PbS. Boyd, JGM, R. Ransome 

- Q2 distribution for SciBar detector

***MiniBooNE***
*From J. Raaf*
*(NOON04)*

- 	All “known” nuclear effects taken into account:
- Pauli suppression, Fermi Motion, Final State Interactions
-            They have **not included** low- shadowing that is only
-         allowed with axial-vector (Boris Kopeliovich at NuInt04)
- 	Lc = 2 / (m2 + Q2)  ≥  RA	**(not **m2**)**
-  _L__c__ __**100 times shorter with **_m_**allowing low **____**-low **__Q__2__** shadowing**_
**     **ONLY MEASURABLE VIA NEUTRINO - NUCLEUS
-     INTERACTIONS!**  MINER********A WILL **_**MEASURE**_** THIS **
**   ****ACROSS A WIDE **** AND **Q2** RANGE WITH  C : Fe : Pb**

- Problem has existed
- for over two years

- Larger than expected rollover at low Q2

## NuInt05 - Nuclear Effects

## High xBj parton distributionsHow well do we know quarks at high-x?

- Ratio of CTEQ5M (solid) and MRST2001 (dotted) to CTEQ6 for the u and d quarks at Q2 = 10 GeV2.  The shaded green envelopes demonstrate the range of possible distributions from the CTEQ6 error analysis.
- Recent high-x measurements indicate conflicting deviations from CTEQ: E-866  uV too **high,** NuTeV uV & dV too **low****	****	****	****	****	****	**
- CTEQ / MINERA working group to investigate high-xBj region.

## Indication that the valence quarks not quite right at high-x??E866 -Drell-Yan Preliminary Results (R. Towell - Hix2004)

**x****beam**** distribution measures *****4u + d***** as *****x--> 1.******	***
*	**	**	**	*
**Both MRST and CTEQ **_***overestimate***_** valence distributions as *****x ****-->**** 1***** by 15-20%.****	****	**
**Possibly related to *****d/u***** ratio as *****x --> 1*****, but requires full PDF-style fit.**
*Radiative corrections have recently been calculated. (Not yet fully applied)*

- xtarget

- xbeam

## NuTeV Compared to CCFR (currently in PDF fits)at High-x Indicates Effect Opposite to E866

- V. Radescu - DIS04

- nuclear effects?

## NOMAD Analysis - NOT DATA YETTwist -6 is required