Model independent method for determination of the DIS structure of free neutron

Misak Sargsian, Mark Strikman

Research output: Contribution to journalArticle

25 Citations (Scopus)

Abstract

We present a model independent procedure for extracting deep-inelastic structure function of "free" neutron from the electron-deuteron scattering with protons produced in the target fragmentation region of the reaction. This procedure is based on the extrapolation of t, which describes the invariant momentum transfered to the proton, to the unphysical region corresponding to the mass of the struck neutron. We demonstrate that the impulse approximation diagram of the reaction has a pole at this limit with a residue being proportional to the "free" neutron structure function. The method is analogous to that of Chew and Low for extraction of the "free" pion-pion and neutron-neutron cross sections from p (π, p) X and d (n, n) p n reactions, respectively. We demonstrate that in the extrapolation the final state interaction amplitudes are smooth functions of t and have negligible contribution in the extracted "free" nucleon structure function. We also estimate the range of the recoil nucleon momenta which could be used for successful extrapolation procedure.

Original languageEnglish (US)
Pages (from-to)223-231
Number of pages9
JournalPhysics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Volume639
Issue number3-4
DOIs
StatePublished - Aug 10 2006

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distributed interactive simulation
extrapolation
neutrons
pions
momentum
neutron cross sections
protons
deuterons
impulses
fragmentation
poles
diagrams
estimates
approximation
scattering
electrons
interactions

All Science Journal Classification (ASJC) codes

  • Nuclear and High Energy Physics

Cite this

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title = "Model independent method for determination of the DIS structure of free neutron",
abstract = "We present a model independent procedure for extracting deep-inelastic structure function of {"}free{"} neutron from the electron-deuteron scattering with protons produced in the target fragmentation region of the reaction. This procedure is based on the extrapolation of t, which describes the invariant momentum transfered to the proton, to the unphysical region corresponding to the mass of the struck neutron. We demonstrate that the impulse approximation diagram of the reaction has a pole at this limit with a residue being proportional to the {"}free{"} neutron structure function. The method is analogous to that of Chew and Low for extraction of the {"}free{"} pion-pion and neutron-neutron cross sections from p (π, p) X and d (n, n) p n reactions, respectively. We demonstrate that in the extrapolation the final state interaction amplitudes are smooth functions of t and have negligible contribution in the extracted {"}free{"} nucleon structure function. We also estimate the range of the recoil nucleon momenta which could be used for successful extrapolation procedure.",
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Model independent method for determination of the DIS structure of free neutron. / Sargsian, Misak; Strikman, Mark.

In: Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, Vol. 639, No. 3-4, 10.08.2006, p. 223-231.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Model independent method for determination of the DIS structure of free neutron

AU - Sargsian, Misak

AU - Strikman, Mark

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N2 - We present a model independent procedure for extracting deep-inelastic structure function of "free" neutron from the electron-deuteron scattering with protons produced in the target fragmentation region of the reaction. This procedure is based on the extrapolation of t, which describes the invariant momentum transfered to the proton, to the unphysical region corresponding to the mass of the struck neutron. We demonstrate that the impulse approximation diagram of the reaction has a pole at this limit with a residue being proportional to the "free" neutron structure function. The method is analogous to that of Chew and Low for extraction of the "free" pion-pion and neutron-neutron cross sections from p (π, p) X and d (n, n) p n reactions, respectively. We demonstrate that in the extrapolation the final state interaction amplitudes are smooth functions of t and have negligible contribution in the extracted "free" nucleon structure function. We also estimate the range of the recoil nucleon momenta which could be used for successful extrapolation procedure.

AB - We present a model independent procedure for extracting deep-inelastic structure function of "free" neutron from the electron-deuteron scattering with protons produced in the target fragmentation region of the reaction. This procedure is based on the extrapolation of t, which describes the invariant momentum transfered to the proton, to the unphysical region corresponding to the mass of the struck neutron. We demonstrate that the impulse approximation diagram of the reaction has a pole at this limit with a residue being proportional to the "free" neutron structure function. The method is analogous to that of Chew and Low for extraction of the "free" pion-pion and neutron-neutron cross sections from p (π, p) X and d (n, n) p n reactions, respectively. We demonstrate that in the extrapolation the final state interaction amplitudes are smooth functions of t and have negligible contribution in the extracted "free" nucleon structure function. We also estimate the range of the recoil nucleon momenta which could be used for successful extrapolation procedure.

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