The Q2-dependence of the generalised Gerasimov–Drell–Hearn integral for the proton

Airapetian, A.; Акопов, Н.; Akushevich, Igor; Amarian, M.; Arrington, J.; Aschenauer, E. C.; Avakian, H.; Avakian, R.; Avetissian, A.; Avetissian, E.; Bailey, P.; Bains, B.; Baumgarten, C.; Beckmann, M.; Belostotski, S.; Bernreuther, S.; Bianchi, N.; Böttcher, H.; Borissov, A.; Bouwhuis, M.; Brack, J.; Brauksiepe, S.; Braun, B.; Brückner, W.; Brüll, A.; Budz, P.; Bulten, H.; Capitani, G. P.; Carter, P.; Chumney, P.; Cisbani, E.; Court, G.R.; Dalpiaz, P. F.; Лео, Р. Де; Nardo, L. De; Sanctis, E. De; Schepper, D. De; Devitsin, E.; Huberts, P.K.A. de Witt; Nezza, P. Di; Djordjadze, V.; Düren, M.; Dvoredsky, A.; Elbakian, G.; Ely, James H.; Fantoni, A.; Fechtchenko, A.; Ferro‐Luzzi, M.; Fiedler, K.; Filippone, B. W.; Fischer, H.; Fox, B. D.; Franz, J.; Frullani, S.; Gärber, Y.; Garibaldi, F.; Garutti, E.; Gavrilov, G.; Gharibyan, V.; Golendukhin, A.; Graw, G.; Grebeniouk, O.; Green, P.W.; Greeniaus, L.G.; Gute, A.; Haeberli, W.; Hartig, M.; Hasch, D.; Heesbeen, D.; Heinsius, F. H.; Henoch, M.; Hertenberger, R.; Hesselink, W.H.A.; Hoffmann-Rothe, P.; Hofman, G.; Holler, Y.; Holt, R. J.; Hommez, B.; Iarygin, G.; Iodice, M.; Izotov, A.; Jackson, H. E.; Jgoun, A.; Jung, P.; Kaiser, R.; Kanesaka, J.; Kinney, E.; Kisselev, A.; Kitching, P.; Kobayashi, Haruo; Koch, Norbert; Königsmann, K.; Kolster, H.; Коротков, В. А.; Kotik, E.; Kozlov, V.; Krivokhijine, V. G.; Kyle, G. S.; Lagamba, L.; Laziev, A.; Lenisa, P.; Lindemann, T.; Lorenzon, W.; Makins, N.; Martin, J. W.; Marukyan, H.; Masoli, F.; McAndrew, M.; McIlhany, K.; McKeown, R. D.; Menden, F.; Metz, A.; Meyners, N.; Mikloukho, O.; Miller, C. A.; Milner, R.; Mitsyn, Valeri Valentinovitch; Muccifora, V.; Mussa, R.; Нагайцев, А.; Nappi, E.; Naryshkin, Y.; Nass, A.; Negodaeva, K.; Nowak, W.-D.; O’Neill, T. G.; Openshaw, R.; Ouyang, J.; Owen, B.; Pate, S. F.; Potashov, S.; Potterveld, D. H.; Rakness, G.; Rappoport, V.; Redwine, R.; Reggiani, D.; Reolon, A. R.; Ristinen, R.A.; Rith, Klaus; Robinson, D.; Ruh, M.; Ryckbosch, D.; Sakemi, Y.; Savin, I.; Scarlett, C.; Schäfer, Andreas; Schill, C.; Schmidt, Friedrich; Schnell, G.; Schüler, K. P.; Schwind, A.; Seibert, J. Anthony; Seitz, B.; Shibata, T. A.; Shin, Taeho; Shutov, V.; Simani, C.; Simon, A.; Sinram, K.; Steffens, E.; Steijger, J. J. M.; Stewart, J.; Stößlein, U.; Suetsugu, K.; Sutter, M.; Tallini, H.; Taroian, S.; Terkulov, A.; Tessarin, S.; Thomas, E.; Tipton, B.; Tytgat, M.; Urciuoli, G. M.; Brand, J. F. J. van den; Steenhoven, G. van der; Vyver, R. Van de; Hunen, J. J. van; Vetterli, M. C.; Vikhrov, V.; Vincter, M. G.; Visser, J.; Volk, E.; Weiskopf, C.; Wendland, J.; Wilbert, Jürgen; Wise, T.; Yen, S.; Yoneyama, Satoshi; Zohrabian, H.

doi:10.1016/s0370-2693(00)01111-4

Cited by 21 publications

(7 citation statements)

References 33 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The main purpose of EG1dvcs was high Q, up to 2.65 GeV (Q 2 = 7 GeV 2 ), exclusive measurements of Deep Virtual Compton Scattering. Therefore, it provided highly precise inclusive Γ p−n 1 data compared to the older data in the same domain [27][28][29][30]. E97110, E03006 and E05111 were dedicated to test Chiral Effective Field Theory predictions by covering very low Q domains: 0.19 ≤ Q ≤ 0.49, 0.11 ≤ Q ≤ 0.92 and 0.14 ≤ Q ≤ 0.70 GeV, respectively.…”

Section: Experimental Extraction Of α Gmentioning

confidence: 99%

“…Inner error bars represent the statistical uncertainties and outer ones the systematic and statistical uncertainties added quadratically. The open symbols show the older world data [27][28][29][30] with the error bars the quadratic sum of the systematic and statistical uncertainties. Also shown are the HLFQCD [24] (red line, using the HLFQCD scale κ = 0.534 GeV [59]) and DSE [25] (magenta line and hatched band) parameter-free predictions of effective charges.…”

Section: Experimental Extraction Of α Gmentioning

confidence: 99%

“…Former extractions of α g 1 [26] were obtained from experimental data on Γ p−n 1 from CERN [27], DESY [28], Jefferson Lab (JLab) [29] and SLAC [30], see Fig. 1.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Experimental determination of the QCD effective charge $α_{g_1}(Q)$

Deur,

Burkert,

Chen

et al. 2022

Preprint

View full text Add to dashboard Cite

The QCD effective charge α g 1 (Q) is an observable that characterizes the magnitude of the strong interaction. At high momentum Q, it coincides with the QCD running coupling α s (Q). At low Q, it offers a nonperturbative definition of the running coupling. We have extracted α g 1 (Q) from measurements carried out at Jefferson Lab that span the very low to moderately high Q domain, 0.14 ≤ Q ≤ 2.18 GeV. The precision of the new results is much improved over the previous extractions and the reach in Q at the lower end is significantly expanded. The data show that α g 1 (Q) becomes Q-independent at very low Q. They compare well with two recent predictions of the QCD effective charge based on Dyson-Schwinger equations and on the AdS/CFT duality.

show abstract

Section: Experimental Extraction Of α Gmentioning

confidence: 99%

Section: Experimental Extraction Of α Gmentioning

confidence: 99%

See 1 more Smart Citation

Experimental determination of the QCD effective charge $α_{g_1}(Q)$

Deur,

Burkert,

Chen

et al. 2022

Preprint

View full text Add to dashboard Cite

show abstract

“…Former extractions of α g 1 [26] were obtained from experimental data on Γ p−n 1 from CERN [27], DESY [28], Jefferson Lab (JLab) [29] and SLAC [30]; see Figure 1. Since the results reported in Ref.…”

Section: Introductionmentioning

confidence: 99%

Experimental Determination of the QCD Effective Charge αg1(Q)

et al. 2022

View full text Add to dashboard Cite

The QCD effective charge αg1(Q) is an observable that characterizes the magnitude of the strong interaction. At high momentum Q, it coincides with the QCD running coupling αs(Q). At low Q, it offers a nonperturbative definition of the running coupling. We have extracted αg1(Q) from measurements carried out at Jefferson Lab that span the very low to moderately high Q domain, 0.14≤Q≤2.18 GeV. The precision of the new results is much improved over the previous extractions and the reach in Q at the lower end is significantly expanded. The data show that αg1(Q) becomes Q-independent at very low Q. They compare well with two recent predictions of the QCD effective charge based on Dyson–Schwinger equations and on the AdS/CFT duality.

show abstract

“…In addition, we show that such an experiment can also access the polarized structure function g 1 (x B , Q 2 ) at HERMES in the low Q 2 region and at eRHIC over a wide range of the Bjorken scaling variable x B and Q 2 . g 1 (x B , Q 2 ) and its first x B moment in the low Q 2 region have been studied in fully inclusive measurements at SLAC [9], HERMES [10,11] and JLab [12,13]. The most recent measurements by CLAS [14] are in the kinematical region Q 2 = 0.15 − 1.64 GeV 2 .…”

Section: Introductionmentioning

confidence: 99%

Accessing the longitudinally polarized photon content of the proton

Mukherjee

Pisano

2004

Phys. Rev. D

View full text Add to dashboard Cite

We investigate the QED Compton process in longitudinally polarized lepton-proton scattering both in the elastic and inelastic channels and show that the cross section can be expressed in terms of the polarized equivalent photon distribution of the proton. We provide the necessary kinematical constraints to extract the polarized photon content of the proton using this process at HERMES, COMPASS, and eRHIC. We also discuss the suppression of the major background process coming from virtual Compton scattering. We point out that such an experiment can give valuable information on g(1)(x(B),Q(2)) in the small x(B), broad Q(2) region at the future polarized collider eRHIC and especially in the lower Q(2), medium x(B) region in fixed target experiments

show abstract

The Q2-dependence of the generalised Gerasimov–Drell–Hearn integral for the proton

Cited by 21 publications

References 33 publications

Experimental determination of the QCD effective charge $α_{g_1}(Q)$

Experimental determination of the QCD effective charge $α_{g_1}(Q)$

Experimental Determination of the QCD Effective Charge αg1(Q)

Accessing the longitudinally polarized photon content of the proton

Contact Info

Product

Resources

About