CLAS Approved Analysis (CAA) of E1-6 experiment
- Spokesperson
- M. Osipenko
- Year
- 2002
- Abstract
- Semi-inclusive π+ electroproduction on protons has been measured with the CLAS detector at Jefferson Lab. The measurement was performed on a liquid-hydrogen target using a 5.75 GeV electron beam. The complete five-fold differential cross sections were measured over a wide kinematic range including the complete range of azimuthal angles between hadronic and leptonic planes, φ, enabling us to separate the φ-dependent terms. Our measurements of the φ-independent term of the cross section at low Bjorken x were found to be in fairly good agreement with pQCD calculations. Indeed, the conventional current fragmentation calculation can account for almost all of the observed cross section, even at small π+ momentum. The measured center-of-momentum spectra are in qualitative agreement with highenergy data, which suggests a surprising numerical similarity between the spectator diquark fragmentation in the present reaction and the antiquark fragmentation measured in e+e- collisions. We have observed that the two φ-dependent terms of the cross section are small. Within our precision the cos2φ term is compatible with zero, except for the low-z region, and the measured cosφ term is much smaller in magnitude than the sum of the Cahn and Berger effects.
- Publication
-
- M. Osipenko, M. Ripani, G. Ricco, and CLAS Collaboration Measurement of semi-inclusive π+ electroproduction off the proton. // Phys.Rev.D80,032004 (2009)
- Quantities
- d5σ/dx dQ2 dz dp2T dφ
Measurements
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ID | Quantity | Beam | Target | Final state |
Q2min, GeV2 |
Q2max, GeV2 |
Wmin, GeV |
Wmax, GeV |
---|---|---|---|---|---|---|---|---|
E29M1 | d5σ/dx dQ2 dz dp2T dφ | e | p | π++X | 1.30999994 | 1.55999994 | 2.77873182 | 3.32660913 |
E29M2 | d5σ/dx dQ2 dz dp2T dφ | e | p | π++X | 1.30999994 | 1.55999994 | 2.54370999 | 3.0044775 |
E29M3 | d5σ/dx dQ2 dz dp2T dφ | e | p | π++X | 1.55999994 | 1.87 | 2.74540997 | 3.26278234 |
E29M4 | d5σ/dx dQ2 dz dp2T dφ | e | p | π++X | 1.55999994 | 1.87 | 2.53031421 | 2.97659636 |
E29M5 | d5σ/dx dQ2 dz dp2T dφ | e | p | π++X | 1.55999994 | 1.87 | 2.34733605 | 2.73858333 |
E29M6 | d5σ/dx dQ2 dz dp2T dφ | e | p | π++X | 1.55999994 | 1.87 | 2.18866634 | 2.53574014 |
E29M7 | d5σ/dx dQ2 dz dp2T dφ | e | p | π++X | 1.55999994 | 1.87 | 2.04891992 | 2.35949779 |
E29M8 | d5σ/dx dQ2 dz dp2T dφ | e | p | π++X | 1.55999994 | 1.87 | 1.92424142 | 2.20394278 |
E29M9 | d5σ/dx dQ2 dz dp2T dφ | e | p | π++X | 1.55999994 | 1.87 | 1.81178606 | 2.06483841 |
E29M10 | d5σ/dx dQ2 dz dp2T dφ | e | p | π++X | 1.55999994 | 1.87 | 1.70939994 | 1.93905461 |
E29M11 | d5σ/dx dQ2 dz dp2T dφ | e | p | π++X | 1.55999994 | 1.87 | 1.6154151 | 1.82421768 |
E29M12 | d5σ/dx dQ2 dz dp2T dφ | e | p | π++X | 1.55999994 | 1.87 | 1.52851522 | 1.71848536 |
E29M13 | d5σ/dx dQ2 dz dp2T dφ | e | p | π++X | 1.55999994 | 1.87 | 1.4476434 | 1.62039936 |
E29M14 | d5σ/dx dQ2 dz dp2T dφ | e | p | π++X | 1.55999994 | 1.87 | 1.37193704 | 1.52878308 |
E29M15 | d5σ/dx dQ2 dz dp2T dφ | e | p | π++X | 1.55999994 | 1.87 | 1.30068183 | 1.44267082 |
E29M16 | d5σ/dx dQ2 dz dp2T dφ | e | p | π++X | 1.87 | 2.23000002 | 2.73858333 | 3.22433543 |
E29M17 | d5σ/dx dQ2 dz dp2T dφ | e | p | π++X | 1.87 | 2.23000002 | 2.53574014 | 2.96212411 |
E29M18 | d5σ/dx dQ2 dz dp2T dφ | e | p | π++X | 1.87 | 2.23000002 | 2.35949779 | 2.73831248 |
E29M19 | d5σ/dx dQ2 dz dp2T dφ | e | p | π++X | 1.87 | 2.23000002 | 2.20394278 | 2.5435245 |
E29M20 | d5σ/dx dQ2 dz dp2T dφ | e | p | π++X | 1.87 | 2.23000002 | 2.06483841 | 2.37128496 |
E29M21 | d5σ/dx dQ2 dz dp2T dφ | e | p | π++X | 1.87 | 2.23000002 | 1.93905461 | 2.21695065 |
E29M22 | d5σ/dx dQ2 dz dp2T dφ | e | p | π++X | 1.87 | 2.23000002 | 1.82421768 | 2.07708716 |
E29M23 | d5σ/dx dQ2 dz dp2T dφ | e | p | π++X | 1.87 | 2.23000002 | 1.71848536 | 1.94908464 |
E29M24 | d5σ/dx dQ2 dz dp2T dφ | e | p | π++X | 1.87 | 2.23000002 | 1.62039936 | 1.83091283 |
E29M25 | d5σ/dx dQ2 dz dp2T dφ | e | p | π++X | 1.87 | 2.23000002 | 1.52878308 | 1.72095788 |
E29M26 | d5σ/dx dQ2 dz dp2T dφ | e | p | π++X | 1.87 | 2.23000002 | 1.44267082 | 1.6179111 |
E29M27 | d5σ/dx dQ2 dz dp2T dφ | e | p | π++X | 1.87 | 2.23000002 | 1.36125588 | 1.52068985 |
E29M28 | d5σ/dx dQ2 dz dp2T dφ | e | p | π++X | 1.87 | 2.23000002 | 1.28385282 | 1.42837989 |
E29M29 | d5σ/dx dQ2 dz dp2T dφ | e | p | π++X | 1.87 | 2.23000002 | 1.20986795 | 1.34019196 |
E29M30 | d5σ/dx dQ2 dz dp2T dφ | e | p | π++X | 2.23000002 | 2.66000009 | 2.73831248 | 3.20878601 |
E29M31 | d5σ/dx dQ2 dz dp2T dφ | e | p | π++X | 2.23000002 | 2.66000009 | 2.5435245 | 2.9621737 |
E29M32 | d5σ/dx dQ2 dz dp2T dφ | e | p | π++X | 2.23000002 | 2.66000009 | 2.37128496 | 2.74722576 |
E29M33 | d5σ/dx dQ2 dz dp2T dφ | e | p | π++X | 2.23000002 | 2.66000009 | 2.21695065 | 2.5568521 |
E29M34 | d5σ/dx dQ2 dz dp2T dφ | e | p | π++X | 2.23000002 | 2.66000009 | 2.07708716 | 2.38596463 |
E29M35 | d5σ/dx dQ2 dz dp2T dφ | e | p | π++X | 2.23000002 | 2.66000009 | 1.94908464 | 2.23079371 |
E29M36 | d5σ/dx dQ2 dz dp2T dφ | e | p | π++X | 2.23000002 | 2.66000009 | 1.83091283 | 2.08846998 |
E29M37 | d5σ/dx dQ2 dz dp2T dφ | e | p | π++X | 2.23000002 | 2.66000009 | 1.72095788 | 1.95675349 |
E29M38 | d5σ/dx dQ2 dz dp2T dφ | e | p | π++X | 2.23000002 | 2.66000009 | 1.6179111 | 1.83385706 |
E29M39 | d5σ/dx dQ2 dz dp2T dφ | e | p | π++X | 2.23000002 | 2.66000009 | 1.52068985 | 1.71832156 |
E29M40 | d5σ/dx dQ2 dz dp2T dφ | e | p | π++X | 2.23000002 | 2.66000009 | 1.42837989 | 1.6089288 |
E29M41 | d5σ/dx dQ2 dz dp2T dφ | e | p | π++X | 2.23000002 | 2.66000009 | 1.34019196 | 1.50463629 |
E29M42 | d5σ/dx dQ2 dz dp2T dφ | e | p | π++X | 2.23000002 | 2.66000009 | 1.25542772 | 1.40452719 |
E29M43 | d5σ/dx dQ2 dz dp2T dφ | e | p | π++X | 2.66000009 | 3.17000008 | 2.5568521 | 2.9707725 |
E29M44 | d5σ/dx dQ2 dz dp2T dφ | e | p | π++X | 2.66000009 | 3.17000008 | 2.38596463 | 2.76082087 |
E29M45 | d5σ/dx dQ2 dz dp2T dφ | e | p | π++X | 2.66000009 | 3.17000008 | 2.23079371 | 2.57206535 |
E29M46 | d5σ/dx dQ2 dz dp2T dφ | e | p | π++X | 2.66000009 | 3.17000008 | 2.08846998 | 2.40037107 |
E29M47 | d5σ/dx dQ2 dz dp2T dφ | e | p | π++X | 2.66000009 | 3.17000008 | 1.95675349 | 2.24258447 |
E29M48 | d5σ/dx dQ2 dz dp2T dφ | e | p | π++X | 2.66000009 | 3.17000008 | 1.83385706 | 2.09623575 |
E29M49 | d5σ/dx dQ2 dz dp2T dφ | e | p | π++X | 2.66000009 | 3.17000008 | 1.71832156 | 1.95934546 |
E29M50 | d5σ/dx dQ2 dz dp2T dφ | e | p | π++X | 2.66000009 | 3.17000008 | 1.6089288 | 1.83028555 |
E29M51 | d5σ/dx dQ2 dz dp2T dφ | e | p | π++X | 2.66000009 | 3.17000008 | 1.50463629 | 1.70768356 |
E29M52 | d5σ/dx dQ2 dz dp2T dφ | e | p | π++X | 2.66000009 | 3.17000008 | 1.40452719 | 1.59034693 |
E29M53 | d5σ/dx dQ2 dz dp2T dφ | e | p | π++X | 2.66000009 | 3.17000008 | 1.30776775 | 1.47720397 |
E29M54 | d5σ/dx dQ2 dz dp2T dφ | e | p | π++X | 2.66000009 | 3.17000008 | 1.21356976 | 1.36725044 |
E29M55 | d5σ/dx dQ2 dz dp2T dφ | e | p | π++X | 3.17000008 | 3.78999996 | 2.57206535 | 2.99010253 |
E29M56 | d5σ/dx dQ2 dz dp2T dφ | e | p | π++X | 3.17000008 | 3.78999996 | 2.40037107 | 2.78158665 |
E29M57 | d5σ/dx dQ2 dz dp2T dφ | e | p | π++X | 3.17000008 | 3.78999996 | 2.24258447 | 2.59162283 |
E29M58 | d5σ/dx dQ2 dz dp2T dφ | e | p | π++X | 3.17000008 | 3.78999996 | 2.09623575 | 2.41673923 |
E29M59 | d5σ/dx dQ2 dz dp2T dφ | e | p | π++X | 3.17000008 | 3.78999996 | 1.95934546 | 2.2542088 |
E29M60 | d5σ/dx dQ2 dz dp2T dφ | e | p | π++X | 3.17000008 | 3.78999996 | 1.83028555 | 2.10183358 |
E29M61 | d5σ/dx dQ2 dz dp2T dφ | e | p | π++X | 3.17000008 | 3.78999996 | 1.70768356 | 1.95779407 |
E29M62 | d5σ/dx dQ2 dz dp2T dφ | e | p | π++X | 3.17000008 | 3.78999996 | 1.59034693 | 1.82053792 |
E29M63 | d5σ/dx dQ2 dz dp2T dφ | e | p | π++X | 3.17000008 | 3.78999996 | 1.47720397 | 1.68869531 |
E29M64 | d5σ/dx dQ2 dz dp2T dφ | e | p | π++X | 3.17000008 | 3.78999996 | 1.36725044 | 1.56100559 |
E29M65 | d5σ/dx dQ2 dz dp2T dφ | e | p | π++X | 3.17000008 | 3.78999996 | 1.25949681 | 1.43624878 |
E29M66 | d5σ/dx dQ2 dz dp2T dφ | e | p | π++X | 3.78999996 | 4.51999998 | 2.41673923 | 2.80011153 |
E29M67 | d5σ/dx dQ2 dz dp2T dφ | e | p | π++X | 3.78999996 | 4.51999998 | 2.2542088 | 2.6069212 |
E29M68 | d5σ/dx dQ2 dz dp2T dφ | e | p | π++X | 3.78999996 | 4.51999998 | 2.10183358 | 2.42706418 |
E29M69 | d5σ/dx dQ2 dz dp2T dφ | e | p | π++X | 3.78999996 | 4.51999998 | 1.95779407 | 2.25810575 |
E29M70 | d5σ/dx dQ2 dz dp2T dφ | e | p | π++X | 3.78999996 | 4.51999998 | 1.82053792 | 2.09801459 |
E29M71 | d5σ/dx dQ2 dz dp2T dφ | e | p | π++X | 3.78999996 | 4.51999998 | 1.68869531 | 1.94503939 |
E29M72 | d5σ/dx dQ2 dz dp2T dφ | e | p | π++X | 3.78999996 | 4.51999998 | 1.56100559 | 1.79760849 |
E29M73 | d5σ/dx dQ2 dz dp2T dφ | e | p | π++X | 3.78999996 | 4.51999998 | 1.43624878 | 1.65424228 |
E29M74 | d5σ/dx dQ2 dz dp2T dφ | e | p | π++X | 3.78999996 | 4.51999998 | 1.31316817 | 1.51346171 |
E29M75 | d5σ/dx dQ2 dz dp2T dφ | e | p | π++X | 3.78999996 | 4.51999998 | 1.19036925 | 1.37367642 |
E29M76 | d5σ/dx dQ2 dz dp2T dφ | e | p | π++X | 4.51999998 | 5.4000001 | 2.09801459 | 2.43318319 |
E29M77 | d5σ/dx dQ2 dz dp2T dφ | e | p | π++X | 4.51999998 | 5.4000001 | 1.94503939 | 2.25548911 |
E29M78 | d5σ/dx dQ2 dz dp2T dφ | e | p | π++X | 4.51999998 | 5.4000001 | 1.79760849 | 2.08526516 |
E29M79 | d5σ/dx dQ2 dz dp2T dφ | e | p | π++X | 4.51999998 | 5.4000001 | 1.65424228 | 1.92070866 |
E29M80 | d5σ/dx dQ2 dz dp2T dφ | e | p | π++X | 4.51999998 | 5.4000001 | 1.51346171 | 1.76008391 |
E29M81 | d5σ/dx dQ2 dz dp2T dφ | e | p | π++X | 4.51999998 | 5.4000001 | 1.37367642 | 1.60159981 |
E29M82 | d5σ/dx dQ2 dz dp2T dφ | e | p | π++X | 4.51999998 | 5.4000001 | 1.23302066 | 1.44324946 |
E29M83 | d5σ/dx dQ2 dz dp2T dφ | e | p | π++X | 5.4000001 | 6.44999981 | 1.92070866 | 2.24112916 |
E29M84 | d5σ/dx dQ2 dz dp2T dφ | e | p | π++X | 5.4000001 | 6.44999981 | 1.76008391 | 2.05797768 |
E29M85 | d5σ/dx dQ2 dz dp2T dφ | e | p | π++X | 5.4000001 | 6.44999981 | 1.60159981 | 1.8785857 |
E29M86 | d5σ/dx dQ2 dz dp2T dφ | e | p | π++X | 5.4000001 | 6.44999981 | 1.44324946 | 1.70079875 |
E29M87 | d5σ/dx dQ2 dz dp2T dφ | e | p | π++X | 5.4000001 | 6.44999981 | 1.282552 | 1.5221076 |
E29M88 | d5σ/dx dQ2 dz dp2T dφ | e | p | π++X | 6.44999981 | 7.69999981 | 1.33925724 | 1.61096108 |
E29M89 | d5σ/dx dQ2 dz dp2T dφ | e | p | π++X | 6.44999981 | 7.69999981 | 1.14743936 | 1.40377986 |
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