Search

Your search keyword '"Allada K"' showing total 9 results
Start Over Author "Allada K" Topic mathematical sciences
9 results on '"Allada K"'

1. Proton spin structure and generalized polarizabilities in the strong quantum chromodynamics regime

Author

Ruth, D, Zielinski, R, Gu, C, Allada (Cummings), M, Badman, T, Huang, M, Liu, J, Zhu, P, Allada, K, Zhang, J, Camsonne, A, Chen, J-P, Slifer, K, Aniol, K, Annand, J, Arrington, J, Averett, T, Baghdasaryan, H, Bellini, V, Boeglin, W, Brock, J, Carlin, C, Chen, C, Cisbani, E, Crabb, D, Daniel, A, Day, D, Duve, R, Fassi, L El, Friedman, M, Fuchey, E, Gao, H, Gilman, R, Glamazdin, S, Gueye, P, Hafez, M, Han, Y, Hansen, O, Shabestari, M Hashemi, Hen, O, Higinbotham, D, Horn, T, Iqbal, S, Jensen, E, Kang, H, Keith, CD, Kelleher, A, Keller, D, Khanal, H, Korover, I, Kumbartzki, G, Li, W, Lichtenstadt, J, Lindgren, R, Long, E, Malace, S, Markowitz, P, Maxwell, J, Meekins, DM, Meziani, ZE, McLean, C, Michaels, R, Mihovilovič, M, Muangma, N, Camacho, C Munoz, Musson, J, Myers, K, Oh, Y, Carmignotto, M Pannunzio, Perdrisat, C, Phillips, S, Piasetzky, E, Pierce, J, Punjabi, V, Qiang, Y, Reimer, PE, Roblin, Y, Ron, G, Rondon, O, Russo, G, Saenboonruang, K, Sawatzky, B, Shahinyan, A, Shneor, R, Širca, S, Sjoegren, J, Solvignon-Slifer, P, Sparveris, N, Sulkosky, V, Wesselmann, F, Yan, W, Yang, H, Yao, H, Ye, Z, Yurov, M, Zhang, Y, Zhao, YX, and Zheng, X

Subjects
Mathematical Sciences, Physical Sciences, Fluids & Plasmas
Abstract

The strong interaction is not well understood at low energies or for interactions with low momentum transfer. Chiral perturbation theory gives testable predictions for the nucleonic generalized polarizabilities, which are fundamental quantities describing the nucleon’s response to an external field. We report a measurement of the proton’s generalized spin polarizabilities extracted with a polarized electron beam and a polarized solid ammonia target in the region where chiral perturbation theory is expected to be valid. The investigated structure function g2 characterizes the internal spin structure of the proton. From its moments, we extract the longitudinal–transverse spin polarizability δLT and twist-3 matrix element and polarizability d2¯. Our results provide discriminating power between existing chiral perturbation theory calculations and will help provide a better understanding of this strong quantum chromodynamics regime.

Published
2022

2. Deeply Virtual Compton Scattering Cross Section at High Bjorken x_{B}.

Author

Georges, F, Rashad, MNH, Stefanko, A, Dlamini, M, Karki, B, Ali, SF, Lin, P-J, Ko, H-S, Israel, N, Adikaram, D, Ahmed, Z, Albataineh, H, Aljawrneh, B, Allada, K, Allison, S, Alsalmi, S, Androic, D, Aniol, K, Annand, J, Atac, H, Averett, T, Ayerbe Gayoso, C, Bai, X, Bane, J, Barcus, S, Bartlett, K, Bellini, V, Beminiwattha, R, Bericic, J, Biswas, D, Brash, E, Bulumulla, D, Campbell, J, Camsonne, A, Carmignotto, M, Castellano, J, Chen, C, Chen, J-P, Chetry, T, Christy, ME, Cisbani, E, Clary, B, Cohen, E, Compton, N, Cornejo, JC, Covrig Dusa, S, Crowe, B, Danagoulian, S, Danley, T, De Persio, F, Deconinck, W, Defurne, M, Desnault, C, Di, D, Duer, M, Duran, B, Ent, R, Fanelli, C, Franklin, G, Fuchey, E, Gal, C, Gaskell, D, Gautam, T, Glamazdin, O, Gnanvo, K, Gray, VM, Gu, C, Hague, T, Hamad, G, Hamilton, D, Hamilton, K, Hansen, O, Hauenstein, F, Henry, W, Higinbotham, DW, Holmstrom, T, Horn, T, Huang, Y, Huber, GM, Hyde, CE, Ibrahim, H, Jen, C-M, Jin, K, Jones, M, Kabir, A, Keppel, C, Khachatryan, V, King, PM, Li, S, Li, WB, Liu, J, Liu, H, Liyanage, A, Magee, J, Malace, S, Mammei, J, Markowitz, P, McClellan, E, Mazouz, M, and Meddi, F

Subjects
Jefferson Lab Hall A Collaboration, Mathematical Sciences, Physical Sciences, Engineering, General Physics
Abstract

We report high-precision measurements of the deeply virtual Compton scattering (DVCS) cross section at high values of the Bjorken variable x_{B}. DVCS is sensitive to the generalized parton distributions of the nucleon, which provide a three-dimensional description of its internal constituents. Using the exact analytic expression of the DVCS cross section for all possible polarization states of the initial and final electron and nucleon, and final state photon, we present the first experimental extraction of all four helicity-conserving Compton form factors (CFFs) of the nucleon as a function of x_{B}, while systematically including helicity flip amplitudes. In particular, the high accuracy of the present data demonstrates sensitivity to some very poorly known CFFs.

Published
2022

3. Form Factors and Two-Photon Exchange in High-Energy Elastic Electron-Proton Scattering

Author

Christy, ME, Gautam, T, Ou, L, Schmookler, B, Wang, Y, Adikaram, D, Ahmed, Z, Albataineh, H, Ali, SF, Aljawrneh, B, Allada, K, Allison, SL, Alsalmi, S, Androic, D, Aniol, K, Annand, J, Arrington, J, Atac, H, Averett, T, Gayoso, C Ayerbe, Bai, X, Bane, J, Barcus, S, Bartlett, K, Bellini, V, Beminiwattha, R, Bericic, J, Bhatt, H, Bhetuwal, D, Biswas, D, Brash, E, Bulumulla, D, Camacho, CM, Campbell, J, Camsonne, A, Carmignotto, M, Castellanos, J, Chen, C, Chen, J-P, Chetry, T, Cisbani, E, Clary, B, Cohen, E, Compton, N, Cornejo, JC, Dusa, S Covrig, Crowe, B, Danagoulian, S, Danley, T, Deconinck, W, Defurne, M, Desnault, C, Di, D, Dlamini, M, Duer, M, Duran, B, Ent, R, Fanelli, C, Fuchey, E, Gal, C, Gaskell, D, Georges, F, Gilad, S, Glamazdin, O, Gnanvo, K, Gramolin, AV, Gray, VM, Gu, C, Habarakada, A, Hague, T, Hamad, G, Hamilton, D, Hamilton, K, Hansen, O, Hauenstein, F, Hernandez, AV, Henry, W, Higinbotham, DW, Holmstrom, T, Horn, T, Huang, Y, Huber, GM, Hyde, C, Ibrahim, H, Israel, N, Jen, C-M, Jin, K, Jones, M, Kabir, A, Karki, B, Keppel, C, Khachatryan, V, King, PM, Li, S, Li, W, Liu, H, Liu, J, Liyanage, AH, Mack, D, and Magee, J

Subjects
Nuclear and Plasma Physics, Particle and High Energy Physics, Physical Sciences, Mathematical Sciences, Engineering, General Physics, Mathematical sciences, Physical sciences
Abstract

We present new precision measurements of the elastic electron-proton scattering cross section for momentum transfer (Q^{2}) up to 15.75  (GeV/c)^{2}. Combined with existing data, these provide an improved extraction of the proton magnetic form factor at high Q^{2} and double the range over which a longitudinal or transverse separation of the cross section can be performed. The difference between our results and polarization data agrees with that observed at lower Q^{2} and attributed to hard two-photon exchange (TPE) effects, extending to 8  (GeV/c)^{2} the range of Q^{2} for which a discrepancy is established at >95% confidence. We use the discrepancy to quantify the size of TPE contributions needed to explain the cross section at high Q^{2}.

Published
2022

4. Deep Exclusive Electroproduction of π0 at High Q2 in the Quark Valence Regime

Author

Dlamini, M, Karki, B, Ali, SF, Lin, P-J, Georges, F, Ko, H-S, Israel, N, Rashad, MNH, Stefanko, A, Adikaram, D, Ahmed, Z, Albataineh, H, Aljawrneh, B, Allada, K, Allison, S, Alsalmi, S, Androic, D, Aniol, K, Annand, J, Atac, H, Averett, T, Ayerbe Gayoso, C, Bai, X, Bane, J, Barcus, S, Bartlett, K, Bellini, V, Beminiwattha, R, Bericic, J, Biswas, D, Brash, E, Bulumulla, D, Campbell, J, Camsonne, A, Carmignotto, M, Castellano, J, Chen, C, Chen, J-P, Chetry, T, Christy, ME, Cisbani, E, Clary, B, Cohen, E, Compton, N, Cornejo, JC, Covrig Dusa, S, Crowe, B, Danagoulian, S, Danley, T, De Persio, F, Deconinck, W, Defurne, M, Desnault, C, Di, D, Duer, M, Duran, B, Ent, R, Fanelli, C, Franklin, G, Fuchey, E, Gal, C, Gaskell, D, Gautam, T, Glamazdin, O, Gnanvo, K, Gray, VM, Gu, C, Hague, T, Hamad, G, Hamilton, D, Hamilton, K, Hansen, O, Hauenstein, F, Henry, W, Higinbotham, DW, Holmstrom, T, Horn, T, Huang, Y, Huber, GM, Hyde, C, Ibrahim, H, Jen, C-M, Jin, K, Jones, M, Kabir, A, Keppel, C, Khachatryan, V, King, PM, Li, S, Li, W, Liu, J, Liu, H, Liyanage, A, Magee, J, Malace, S, Mammei, J, Markowitz, P, McClellan, E, Meddi, F, and Meekins, D

Subjects
Jefferson Lab Hall A Collaboration, Mathematical Sciences, Physical Sciences, Engineering, General Physics
Abstract

We report measurements of the exclusive neutral pion electroproduction cross section off protons at large values of x_{B} (0.36, 0.48, and 0.60) and Q^{2} (3.1 to 8.4  GeV^{2}) obtained from Jefferson Lab Hall A experiment E12-06-014. The corresponding structure functions dσ_{T}/dt+εdσ_{L}/dt, dσ_{TT}/dt, dσ_{LT}/dt, and dσ_{LT^{'}}/dt are extracted as a function of the proton momentum transfer t-t_{min}. The results suggest the amplitude for transversely polarized virtual photons continues to dominate the cross section throughout this kinematic range. The data are well described by calculations based on transversity generalized parton distributions coupled to a helicity flip distribution amplitude of the pion, thus providing a unique way to probe the structure of the nucleon.

Published
2021

5. Publisher’s Note: JLab Measurements of the He3 Form Factors at Large Momentum Transfers [Phys. Rev. Lett. 119, 162501 (2017)]

Author

Camsonne, A, Katramatou, AT, Olson, M, Acha, A, Allada, K, Anderson, BD, Arrington, J, Baldwin, A, Chen, J-P, Choi, S, Chudakov, E, Cisbani, E, Craver, B, Decowski, P, Dutta, C, Folts, E, Frullani, S, Garibaldi, F, Gilman, R, Gomez, J, Hahn, B, Hansen, J-O, Higinbotham, DW, Holmstrom, T, Huang, J, Iodice, M, Jiang, X, Kelleher, A, Khrosinkova, E, Kievsky, A, Kuchina, E, Kumbartzki, G, Lee, B, LeRose, JJ, Lindgren, RA, Lott, G, Lu, H, Marcucci, LE, Margaziotis, DJ, Markowitz, P, Marrone, S, Meekins, D, Meziani, Z-E, Michaels, R, Moffit, B, Norum, B, Petratos, GG, Puckett, A, Qian, X, Rondon, O, Saha, A, Sawatzky, B, Segal, J, Shabestari, M, Shahinyan, A, Solvignon, P, Sparveris, N, Subedi, RR, Suleiman, R, Sulkosky, V, Urciuoli, GM, Viviani, M, Wang, Y, Wojtsekhowski, BB, Yan, X, Yao, H, Zhang, W-M, Zheng, X, and Zhu, L

Subjects
Quantum Physics, Physical Sciences, Jefferson Lab Hall A Collaboration, Mathematical Sciences, Engineering, General Physics, Mathematical sciences, Physical sciences
Abstract

This corrects the article DOI: 10.1103/PhysRevLett.119.162501.

Published
2017

6. Publisher's Note: JLab Measurements of the ^{3}He Form Factors at Large Momentum Transfers [Phys. Rev. Lett. 119, 162501 (2017)].

Author

Camsonne, A, Katramatou, AT, Olson, M, Acha, A, Allada, K, Anderson, BD, Arrington, J, Baldwin, A, Chen, J-P, Choi, S, Chudakov, E, Cisbani, E, Craver, B, Decowski, P, Dutta, C, Folts, E, Frullani, S, Garibaldi, F, Gilman, R, Gomez, J, Hahn, B, Hansen, J-O, Higinbotham, DW, Holmstrom, T, Huang, J, Iodice, M, Jiang, X, Kelleher, A, Khrosinkova, E, Kievsky, A, Kuchina, E, Kumbartzki, G, Lee, B, LeRose, JJ, Lindgren, RA, Lott, G, Lu, H, Marcucci, LE, Margaziotis, DJ, Markowitz, P, Marrone, S, Meekins, D, Meziani, Z-E, Michaels, R, Moffit, B, Norum, B, Petratos, GG, Puckett, A, Qian, X, Rondon, O, Saha, A, Sawatzky, B, Segal, J, Shabestari, M, Shahinyan, A, Solvignon, P, Sparveris, N, Subedi, RR, Suleiman, R, Sulkosky, V, Urciuoli, GM, Viviani, M, Wang, Y, Wojtsekhowski, BB, Yan, X, Yao, H, Zhang, W-M, Zheng, X, Zhu, L, and Jefferson Lab Hall A Collaboration

Subjects
Jefferson Lab Hall A Collaboration, General Physics, Mathematical Sciences, Physical Sciences, Engineering
Abstract

This corrects the article DOI: 10.1103/PhysRevLett.119.162501.

Published
2017

7. JLab Measurements of the He3 Form Factors at Large Momentum Transfers

Author

Camsonne, A, Katramatou, AT, Olson, M, Acha, A, Allada, K, Anderson, BD, Arrington, J, Baldwin, A, Chen, J-P, Choi, S, Chudakov, E, Cisbani, E, Craver, B, Decowski, P, Dutta, C, Folts, E, Frullani, S, Garibaldi, F, Gilman, R, Gomez, J, Hahn, B, Hansen, J-O, Higinbotham, DW, Holmstrom, T, Huang, J, Iodice, M, Jiang, X, Kelleher, A, Khrosinkova, E, Kievsky, A, Kuchina, E, Kumbartzki, G, Lee, B, LeRose, JJ, Lindgren, RA, Lott, G, Lu, H, Marcucci, LE, Margaziotis, DJ, Markowitz, P, Marrone, S, Meekins, D, Meziani, Z-E, Michaels, R, Moffit, B, Norum, B, Petratos, GG, Puckett, A, Qian, X, Rondon, O, Saha, A, Sawatzky, B, Segal, J, Shabestari, M, Shahinyan, A, Solvignon, P, Sparveris, N, Subedi, RR, Suleiman, R, Sulkosky, V, Urciuoli, GM, Viviani, M, Wang, Y, Wojtsekhowski, BB, Yan, X, Yao, H, Zhang, W-M, Zheng, X, and Zhu, L

Subjects
Nuclear and Plasma Physics, Synchrotrons and Accelerators, Physical Sciences, Heart Disease, Cardiovascular, Jefferson Lab Hall A Collaboration, Mathematical Sciences, Engineering, General Physics, Mathematical sciences, Physical sciences
Abstract

The charge and magnetic form factors, F_{C} and F_{M}, respectively, of ^{3}He are extracted in the kinematic range 25  fm^{-2}≤Q^{2}≤61  fm^{-2} from elastic electron scattering by detecting ^{3}He recoil nuclei and scattered electrons in coincidence with the two High Resolution Spectrometers of the Hall A Facility at Jefferson Lab. The measurements find evidence for the existence of a second diffraction minimum for the magnetic form factor at Q^{2}=49.3  fm^{-2} and for the charge form factor at Q^{2}=62.0  fm^{-2}. Both minima are predicted to exist in the Q^{2} range accessible by this Jefferson Lab experiment. The data are in qualitative agreement with theoretical calculations based on realistic interactions and accurate methods to solve the three-body nuclear problem.

Published
2017

8. JLab Measurements of the ^{3}He Form Factors at Large Momentum Transfers.

Author

Camsonne, A, Katramatou, AT, Olson, M, Acha, A, Allada, K, Anderson, BD, Arrington, J, Baldwin, A, Chen, J-P, Choi, S, Chudakov, E, Cisbani, E, Craver, B, Decowski, P, Dutta, C, Folts, E, Frullani, S, Garibaldi, F, Gilman, R, Gomez, J, Hahn, B, Hansen, J-O, Higinbotham, DW, Holmstrom, T, Huang, J, Iodice, M, Jiang, X, Kelleher, A, Khrosinkova, E, Kievsky, A, Kuchina, E, Kumbartzki, G, Lee, B, LeRose, JJ, Lindgren, RA, Lott, G, Lu, H, Marcucci, LE, Margaziotis, DJ, Markowitz, P, Marrone, S, Meekins, D, Meziani, Z-E, Michaels, R, Moffit, B, Norum, B, Petratos, GG, Puckett, A, Qian, X, Rondon, O, Saha, A, Sawatzky, B, Segal, J, Shabestari, M, Shahinyan, A, Solvignon, P, Sparveris, N, Subedi, RR, Suleiman, R, Sulkosky, V, Urciuoli, GM, Viviani, M, Wang, Y, Wojtsekhowski, BB, Yan, X, Yao, H, Zhang, W-M, Zheng, X, Zhu, L, and Jefferson Lab Hall A Collaboration

Subjects
Jefferson Lab Hall A Collaboration, Heart Disease, Cardiovascular, General Physics, Mathematical Sciences, Physical Sciences, Engineering
Abstract

The charge and magnetic form factors, F_{C} and F_{M}, respectively, of ^{3}He are extracted in the kinematic range 25  fm^{-2}≤Q^{2}≤61  fm^{-2} from elastic electron scattering by detecting ^{3}He recoil nuclei and scattered electrons in coincidence with the two High Resolution Spectrometers of the Hall A Facility at Jefferson Lab. The measurements find evidence for the existence of a second diffraction minimum for the magnetic form factor at Q^{2}=49.3  fm^{-2} and for the charge form factor at Q^{2}=62.0  fm^{-2}. Both minima are predicted to exist in the Q^{2} range accessible by this Jefferson Lab experiment. The data are in qualitative agreement with theoretical calculations based on realistic interactions and accurate methods to solve the three-body nuclear problem.

Published
2017

9. Electroexcitation of the Δ+(1232) at low momentum transfer

Author

Blomberg, A, Anez, D, Sparveris, N, Sarty, AJ, Paolone, M, Gilad, S, Higinbotham, D, Ahmed, Z, Albataineh, H, Allada, K, Anderson, B, Aniol, K, Annand, J, Arrington, J, Averett, T, Baghdasaryan, H, Bai, X, Beck, A, Beck, S, Bellini, V, Benmokhtar, F, Boeglin, W, Camacho, CM, Camsonne, A, Chen, C, Chen, JP, Chirapatpimol, K, Cisbani, E, Dalton, M, Deconinck, W, Defurne, M, De Leo, R, Flay, D, Fomin, N, Friend, M, Frullani, S, Fuchey, E, Garibaldi, F, Gilman, R, Gu, C, Hamilton, D, Hanretty, C, Hansen, O, Shabestari, M Hashemi, Hen, O, Holmstrom, T, Huang, M, Iqbal, S, Kalantarians, N, Kang, H, Kelleher, A, Khandaker, M, Korover, I, Leckey, J, LeRose, J, Lindgren, R, Long, E, Mammei, J, Margaziotis, DJ, Jimenez-Arguello, A Martí, Meekins, D, Meziani, ZE, Mihovilovic, M, Muangma, N, Norum, B, Nuruzzaman, Pan, K, Phillips, S, Piasetzky, E, Polychronopoulou, A, Pomerantz, I, Posik, M, Punjabi, V, Qian, X, Rakhman, A, Reimer, PE, Riordan, S, Ron, G, Saha, A, Schulte, E, Selvy, L, Shneor, R, Sirca, S, Sjoegren, J, Subedi, R, Sulkosky, V, Tireman, W, Wang, D, Watson, J, Wojtsekhowski, B, Yan, W, Yaron, I, Ye, Z, Zhan, X, Zhang, J, Zhang, Y, Zhao, B, Zhao, Z, Zheng, X, and Zhu, P

Subjects
Nuclear and Plasma Physics, Particle and High Energy Physics, Physical Sciences, CMR, Pion electroproduction, Nucleon deformation, Mathematical Physics, Astronomical and Space Sciences, Atomic, Molecular, Nuclear, Particle and Plasma Physics, Nuclear & Particles Physics, Mathematical sciences, Physical sciences
Abstract

We report on new measurements at the resonance at the low momentum transfer region, where the mesonic cloud dynamics is predicted to be dominant and rapidly changing, offering a test bed for chiral effective field theory calculations. The new data explore the dependence of the resonant quadrupole amplitudes and for the first time indicate that the Electric and the Coulomb quadrupole amplitudes converge as. The measurements of the Coulomb quadrupole amplitude have been extended to the lowest momentum transfer ever reached, and suggest that more than half of its magnitude is attributed to the mesonic cloud in this region. The new data disagree with predictions of constituent quark models and are in reasonable agreement with dynamical calculations that include pion cloud effects, chiral effective field theory and lattice calculations. The measurements indicate that improvement is required to the theoretical calculations and provide valuable input that will allow their refinements.

Published
2016

Catalog

Books, media, physical & digital resources
See catalog results