First Measurement of Near-Threshold J/ψ Exclusive Photoproduction off the Proton

Ali, A.; Amaryan, M.; Anassontzis, E. G.; Austregesilo, A.; Baalouch, M.; Barbosa, F.; Barlow, J.; Barnes, A.; Barriga, E.; Beattie, T. D.; Berdnikov, V. V.; Black, T.; Boeglin, W.; Boer, M.; Briscoe, W. J.; Britton, T.; Brooks, W. K.; Cannon, B. E.; Cao, N.; Chudakov, E.; Cole, S.; Cortes, O.; Crede, V.; Dalton, M. M.; Daniels, T.; Deur, A.; Dobbs, S.; Dolgolenko, A.; Dotel, R.; Dugger, M.; Dzhygadlo, R.; Egiyan, H.; Ernst, A.; Eugenio, P.; Fanelli, C.; Fegan, S.; Foda, A. M.; Foote, J.; Frye, J.; Furletov, S.; Gan, L.; Gasparian, A.; Gauzshtein, V.; Gevorgyan, N.; Gleason, C.; Goetzen, K.; Goncalves, A.; Goryachev, V. S.; Guo, L.; Hakobyan, H.; Hamdi, A.; Han, S.; Hardin, J.; Huber, G. M.; Hurley, A.; Ireland, D. G.; Ito, M. M.; Jarvis, N. S.; Jones, R. T.; Kakoyan, V.; Kalicy, G.; Kamel, M.; Kourkoumelis, C.; Kuleshov, S.; Kuznetsov, I.; Larin, I.; Lawrence, D.; Lersch, D. I.; Li, H.; Li, W.; Liu, B.; Livingston, K.; Lolos, G. J.; Lyubovitskij, V.; Mack, D.; Marukyan, H.; Matveev, V.; McCaughan, M.; McCracken, M.; McGinley, W.; McIntyre, J.; Meyer, C. A.; Miskimen, R.; Mitchell, R. E.; Mokaya, F.; Nerling, F.; Ng, L.; Ostrovidov, A. I.; Papandreou, Z.; Patsyuk, M.; Pauli, P.; Pedroni, R.; Pentchev, L.; Peters, K. J.; Phelps, W.; Pooser, E.; Qin, N.; Reinhold, J.; Ritchie, B. G.; Robison, L.; Romanov, D.; Romero, C.; Salgado, C.; Schertz, A. M.; Schumacher, R. A.; Schwiening, J.; Seth, K. K.; Shen, X.; Shepherd, M. R.; Smith, E. S.; Sober, D. I.; Somov, A.; Somov, S.; Soto, O.; Stevens, J. R.; Strakovsky, I. I.; Suresh, K.; Tarasov, V.; Taylor, S.; Teymurazyan, A.; Thiel, A.; Vasileiadis, G.; Werthmüller, D.; Whitlatch, T.; Wickramaarachchi, N.; Williams, M.; Xiao, T.; Yang, Y.; Zarling, J.; Zhang, Z.; Zhao, G.; Zhou, Q.; Zhou, X.; Zihlmann, B.

doi:10.1103/PhysRevLett.123.072001

Title: First Measurement of Near-Threshold $J / ψ$ Exclusive Photoproduction off the Proton

Abstract

We report on the measurement of the $$\gamma p \rightarrow J/\psi p$$ cross section from $$E_\gamma = 11.8$$ GeV down to the threshold at $8.2$ GeV using a tagged photon beam with the GlueX experiment. We find the total cross section falls toward the threshold less steeply than expected from two-gluon exchange models. The differential cross section $$d\sigma /dt$$ has an exponential slope of $$1.67 \pm 0.39$$ GeV$$^{-2}$$ at $10.7$ GeV average energy. The LHCb pentaquark candidates $$P_c^+$$ can be produced in the $s$-channel of this reaction. We see no evidence for them and set model-dependent upper limits on their branching fractions $$\mathcal{B}(P_c^+ \rightarrow J/\psi p)$$ and cross sections $$\sigma(\gamma p \to P_c^+)\times\mathcal{B}(P_c^+ \to J/\psi p) $$.

Authors:: Ali, A.; Amaryan, M.; Anassontzis, E. G.; Austregesilo, A.; Baalouch, M.; Barbosa, F.; Barlow, J.; Barnes, A.; Barriga, E.; Beattie, T. D.; Berdnikov, V. V.; Black, T.; Boeglin, W.; Boer, M.; Briscoe, W. J.; Britton, T.; Brooks, W. K.; Cannon, B. E.; Cao, N.; Chudakov, E. more »« less

Publication Date:: 2019-08-13

Research Org.:: Thomas Jefferson National Accelerator Facility (TJNAF), Newport News, VA (United States); George Washington Univ., Washington, DC (United States)

Sponsoring Org.:: USDOE Office of Science (SC), Nuclear Physics (NP); National Science Foundation (NSF); German Research Foundation (DFG); Natural Sciences and Engineering Research Council of Canada (NSERC); Russian Foundation for Basic Research; UK Science and Technology Facilities Council; National Natural Science Foundation of China (NNSFC)

Contributing Org.:: GlueX Collaboration

OSTI Identifier:: 1574399

Alternate Identifier(s):: OSTI ID: 1557358; OSTI ID: 1594370

Report Number(s):: JLAB-PHY-19-2946; DOE/OR/23177-4686; arXiv:1905.10811
Journal ID: ISSN 0031-9007; PRLTAO; TRN: US2100204

Grant/Contract Number:: AC05-06OR23177; SC0016583

Resource Type:: Accepted Manuscript

Journal Name:: Physical Review Letters

Additional Journal Information:: Journal Volume: 123; Journal Issue: 7; Journal ID: ISSN 0031-9007

Publisher:: American Physical Society (APS)

Country of Publication:: United States

Language:: English

Subject:: 73 NUCLEAR PHYSICS AND RADIATION PHYSICS; 72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS

Citation Formats


                    Ali, A., Amaryan, M., Anassontzis, E. G., Austregesilo, A., Baalouch, M., Barbosa, F., Barlow, J., Barnes, A., Barriga, E., Beattie, T. D., Berdnikov, V. V., Black, T., Boeglin, W., Boer, M., Briscoe, W. J., Britton, T., Brooks, W. K., Cannon, B. E., Cao, N., Chudakov, E., Cole, S., Cortes, O., Crede, V., Dalton, M. M., Daniels, T., Deur, A., Dobbs, S., Dolgolenko, A., Dotel, R., Dugger, M., Dzhygadlo, R., Egiyan, H., Ernst, A., Eugenio, P., Fanelli, C., Fegan, S., Foda, A. M., Foote, J., Frye, J., Furletov, S., Gan, L., Gasparian, A., Gauzshtein, V., Gevorgyan, N., Gleason, C., Goetzen, K., Goncalves, A., Goryachev, V. S., Guo, L., Hakobyan, H., Hamdi, A., Han, S., Hardin, J., Huber, G. M., Hurley, A., Ireland, D. G., Ito, M. M., Jarvis, N. S., Jones, R. T., Kakoyan, V., Kalicy, G., Kamel, M., Kourkoumelis, C., Kuleshov, S., Kuznetsov, I., Larin, I., Lawrence, D., Lersch, D. I., Li, H., Li, W., Liu, B., Livingston, K., Lolos, G. J., Lyubovitskij, V., Mack, D., Marukyan, H., Matveev, V., McCaughan, M., McCracken, M., McGinley, W., McIntyre, J., Meyer, C. A., Miskimen, R., Mitchell, R. E., Mokaya, F., Nerling, F., Ng, L., Ostrovidov, A. I., Papandreou, Z., Patsyuk, M., Pauli, P., Pedroni, R., Pentchev, L., Peters, K. J., Phelps, W., Pooser, E., Qin, N., Reinhold, J., Ritchie, B. G., Robison, L., Romanov, D., Romero, C., Salgado, C., Schertz, A. M., Schumacher, R. A., Schwiening, J., Seth, K. K., Shen, X., Shepherd, M. R., Smith, E. S., Sober, D. I., Somov, A., Somov, S., Soto, O., Stevens, J. R., Strakovsky, I. I., Suresh, K., Tarasov, V., Taylor, S., Teymurazyan, A., Thiel, A., Vasileiadis, G., Werthmüller, D., Whitlatch, T., Wickramaarachchi, N., Williams, M., Xiao, T., Yang, Y., Zarling, J., Zhang, Z., Zhao, G., Zhou, Q., Zhou, X., and Zihlmann, B. First Measurement of Near-Threshold J/ψ Exclusive Photoproduction off the Proton.  United States: N. p., 2019. 
        Web.  doi:10.1103/PhysRevLett.123.072001.

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                    Ali, A., Amaryan, M., Anassontzis, E. G., Austregesilo, A., Baalouch, M., Barbosa, F., Barlow, J., Barnes, A., Barriga, E., Beattie, T. D., Berdnikov, V. V., Black, T., Boeglin, W., Boer, M., Briscoe, W. J., Britton, T., Brooks, W. K., Cannon, B. E., Cao, N., Chudakov, E., Cole, S., Cortes, O., Crede, V., Dalton, M. M., Daniels, T., Deur, A., Dobbs, S., Dolgolenko, A., Dotel, R., Dugger, M., Dzhygadlo, R., Egiyan, H., Ernst, A., Eugenio, P., Fanelli, C., Fegan, S., Foda, A. M., Foote, J., Frye, J., Furletov, S., Gan, L., Gasparian, A., Gauzshtein, V., Gevorgyan, N., Gleason, C., Goetzen, K., Goncalves, A., Goryachev, V. S., Guo, L., Hakobyan, H., Hamdi, A., Han, S., Hardin, J., Huber, G. M., Hurley, A., Ireland, D. G., Ito, M. M., Jarvis, N. S., Jones, R. T., Kakoyan, V., Kalicy, G., Kamel, M., Kourkoumelis, C., Kuleshov, S., Kuznetsov, I., Larin, I., Lawrence, D., Lersch, D. I., Li, H., Li, W., Liu, B., Livingston, K., Lolos, G. J., Lyubovitskij, V., Mack, D., Marukyan, H., Matveev, V., McCaughan, M., McCracken, M., McGinley, W., McIntyre, J., Meyer, C. A., Miskimen, R., Mitchell, R. E., Mokaya, F., Nerling, F., Ng, L., Ostrovidov, A. I., Papandreou, Z., Patsyuk, M., Pauli, P., Pedroni, R., Pentchev, L., Peters, K. J., Phelps, W., Pooser, E., Qin, N., Reinhold, J., Ritchie, B. G., Robison, L., Romanov, D., Romero, C., Salgado, C., Schertz, A. M., Schumacher, R. A., Schwiening, J., Seth, K. K., Shen, X., Shepherd, M. R., Smith, E. S., Sober, D. I., Somov, A., Somov, S., Soto, O., Stevens, J. R., Strakovsky, I. I., Suresh, K., Tarasov, V., Taylor, S., Teymurazyan, A., Thiel, A., Vasileiadis, G., Werthmüller, D., Whitlatch, T., Wickramaarachchi, N., Williams, M., Xiao, T., Yang, Y., Zarling, J., Zhang, Z., Zhao, G., Zhou, Q., Zhou, X., & Zihlmann, B. First Measurement of Near-Threshold J/ψ Exclusive Photoproduction off the Proton.  United States.  doi:https://doi.org/10.1103/PhysRevLett.123.072001

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                    Ali, A., Amaryan, M., Anassontzis, E. G., Austregesilo, A., Baalouch, M., Barbosa, F., Barlow, J., Barnes, A., Barriga, E., Beattie, T. D., Berdnikov, V. V., Black, T., Boeglin, W., Boer, M., Briscoe, W. J., Britton, T., Brooks, W. K., Cannon, B. E., Cao, N., Chudakov, E., Cole, S., Cortes, O., Crede, V., Dalton, M. M., Daniels, T., Deur, A., Dobbs, S., Dolgolenko, A., Dotel, R., Dugger, M., Dzhygadlo, R., Egiyan, H., Ernst, A., Eugenio, P., Fanelli, C., Fegan, S., Foda, A. M., Foote, J., Frye, J., Furletov, S., Gan, L., Gasparian, A., Gauzshtein, V., Gevorgyan, N., Gleason, C., Goetzen, K., Goncalves, A., Goryachev, V. S., Guo, L., Hakobyan, H., Hamdi, A., Han, S., Hardin, J., Huber, G. M., Hurley, A., Ireland, D. G., Ito, M. M., Jarvis, N. S., Jones, R. T., Kakoyan, V., Kalicy, G., Kamel, M., Kourkoumelis, C., Kuleshov, S., Kuznetsov, I., Larin, I., Lawrence, D., Lersch, D. I., Li, H., Li, W., Liu, B., Livingston, K., Lolos, G. J., Lyubovitskij, V., Mack, D., Marukyan, H., Matveev, V., McCaughan, M., McCracken, M., McGinley, W., McIntyre, J., Meyer, C. A., Miskimen, R., Mitchell, R. E., Mokaya, F., Nerling, F., Ng, L., Ostrovidov, A. I., Papandreou, Z., Patsyuk, M., Pauli, P., Pedroni, R., Pentchev, L., Peters, K. J., Phelps, W., Pooser, E., Qin, N., Reinhold, J., Ritchie, B. G., Robison, L., Romanov, D., Romero, C., Salgado, C., Schertz, A. M., Schumacher, R. A., Schwiening, J., Seth, K. K., Shen, X., Shepherd, M. R., Smith, E. S., Sober, D. I., Somov, A., Somov, S., Soto, O., Stevens, J. R., Strakovsky, I. I., Suresh, K., Tarasov, V., Taylor, S., Teymurazyan, A., Thiel, A., Vasileiadis, G., Werthmüller, D., Whitlatch, T., Wickramaarachchi, N., Williams, M., Xiao, T., Yang, Y., Zarling, J., Zhang, Z., Zhao, G., Zhou, Q., Zhou, X., and Zihlmann, B. Tue .  
        "First Measurement of Near-Threshold J/ψ Exclusive Photoproduction off the Proton".  United States.  doi:https://doi.org/10.1103/PhysRevLett.123.072001.  https://www.osti.gov/servlets/purl/1574399.

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@article{osti_1574399,

  title        = {First Measurement of Near-Threshold J/ψ Exclusive Photoproduction off the Proton},

  author       = {Ali, A. and Amaryan, M. and Anassontzis, E. G. and Austregesilo, A. and Baalouch, M. and Barbosa, F. and Barlow, J. and Barnes, A. and Barriga, E. and Beattie, T. D. and Berdnikov, V. V. and Black, T. and Boeglin, W. and Boer, M. and Briscoe, W. J. and Britton, T. and Brooks, W. K. and Cannon, B. E. and Cao, N. and Chudakov, E. and Cole, S. and Cortes, O. and Crede, V. and Dalton, M. M. and Daniels, T. and Deur, A. and Dobbs, S. and Dolgolenko, A. and Dotel, R. and Dugger, M. and Dzhygadlo, R. and Egiyan, H. and Ernst, A. and Eugenio, P. and Fanelli, C. and Fegan, S. and Foda, A. M. and Foote, J. and Frye, J. and Furletov, S. and Gan, L. and Gasparian, A. and Gauzshtein, V. and Gevorgyan, N. and Gleason, C. and Goetzen, K. and Goncalves, A. and Goryachev, V. S. and Guo, L. and Hakobyan, H. and Hamdi, A. and Han, S. and Hardin, J. and Huber, G. M. and Hurley, A. and Ireland, D. G. and Ito, M. M. and Jarvis, N. S. and Jones, R. T. and Kakoyan, V. and Kalicy, G. and Kamel, M. and Kourkoumelis, C. and Kuleshov, S. and Kuznetsov, I. and Larin, I. and Lawrence, D. and Lersch, D. I. and Li, H. and Li, W. and Liu, B. and Livingston, K. and Lolos, G. J. and Lyubovitskij, V. and Mack, D. and Marukyan, H. and Matveev, V. and McCaughan, M. and McCracken, M. and McGinley, W. and McIntyre, J. and Meyer, C. A. and Miskimen, R. and Mitchell, R. E. and Mokaya, F. and Nerling, F. and Ng, L. and Ostrovidov, A. I. and Papandreou, Z. and Patsyuk, M. and Pauli, P. and Pedroni, R. and Pentchev, L. and Peters, K. J. and Phelps, W. and Pooser, E. and Qin, N. and Reinhold, J. and Ritchie, B. G. and Robison, L. and Romanov, D. and Romero, C. and Salgado, C. and Schertz, A. M. and Schumacher, R. A. and Schwiening, J. and Seth, K. K. and Shen, X. and Shepherd, M. R. and Smith, E. S. and Sober, D. I. and Somov, A. and Somov, S. and Soto, O. and Stevens, J. R. and Strakovsky, I. I. and Suresh, K. and Tarasov, V. and Taylor, S. and Teymurazyan, A. and Thiel, A. and Vasileiadis, G. and Werthmüller, D. and Whitlatch, T. and Wickramaarachchi, N. and Williams, M. and Xiao, T. and Yang, Y. and Zarling, J. and Zhang, Z. and Zhao, G. and Zhou, Q. and Zhou, X. and Zihlmann, B.},

  abstractNote = {We report on the measurement of the $\gamma p \rightarrow J/\psi p$ cross section from $E_\gamma = 11.8$ GeV down to the threshold at $8.2$ GeV using a tagged photon beam with the GlueX experiment. We find the total cross section falls toward the threshold less steeply than expected from two-gluon exchange models. The differential cross section $d\sigma /dt$ has an exponential slope of $1.67 \pm 0.39$ GeV$^{-2}$ at $10.7$ GeV average energy. The LHCb pentaquark candidates $P_c^+$ can be produced in the $s$-channel of this reaction. We see no evidence for them and set model-dependent upper limits on their branching fractions $\mathcal{B}(P_c^+ \rightarrow J/\psi p)$ and cross sections $\sigma(\gamma p \to P_c^+)\times\mathcal{B}(P_c^+ \to J/\psi p) $.},

  doi          = {10.1103/PhysRevLett.123.072001},

  journal      = {Physical Review Letters},

  number       = 7,

  volume       = 123,

  place        = {United States},

  year         = {2019},

  month        = {8}

}

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Title: First Measurement of Near-Threshold J / ψ Exclusive Photoproduction off the Proton

Abstract

Citation Formats

Understanding the newly observed heavy pentaquark candidates journal, June 2016

J/ψ-Photoproduction and the gluon structure of the nucleon journal, December 1999

Studies with cathode drift chambers for the GlueX experiment at Jefferson Lab journal, February 2017

PHOTOS - a universal Monte Carlo for QED radiative corrections: version 2.0 journal, April 1994

Photoproduction of exotic baryon resonances journal, January 2016

Decays of pentaquarks in hadrocharmonium and molecular scenarios journal, December 2018

Photoproduction of charm near threshold journal, January 2001

Soft-photon corrections to the Bethe-Heitler process in the γ p → l + l − p reaction journal, April 2018

Formation of hidden-charm pentaquarks in photon-nucleon collisions journal, August 2015

The GlueX Start Counter Detector journal, May 2019

Observation of a Narrow Pentaquark State, P c ( 4312 ) + , and of the Two-Peak Structure of the P c ( 4450 ) + journal, June 2019

Photoproduction of hidden charm pentaquark states P c + ( 4380 ) and P c + ( 4450 ) journal, August 2015

Studying the P c ( 4450 ) resonance in J / ψ photoproduction off protons journal, August 2016

Holographic J / ψ production near threshold and the proton mass problem journal, October 2018

Review of Particle Physics journal, August 2018

Construction and performance of the barrel electromagnetic calorimeter for the GlueX experiment journal, July 2018

How to reveal the exotic nature of the P c ( 4450 ) journal, October 2015

Photoproduction of the ψ ( 3100 ) Meson at 11 GeV journal, December 1975

Timelike Compton scattering: exclusive photoproduction of lepton pairs journal, April 2002

Pair spectrometer hodoscope for Hall D at Jefferson Lab journal, September 2015

Observation of J / ψ p Resonances Consistent with Pentaquark States in Λ b 0 → J / ψ K − p Decays journal, August 2015

Two-gluon form factor of the nucleon and J / ψ photoproduction journal, August 2002

Photoproduction of the ψ Particles journal, August 1975

Pentaquarks with hidden charm as hadroquarkonia journal, January 2018

Limits and confidence intervals in the presence of nuisance parameters journal, October 2005

Molecular interpretation of the P c ( 4440 ) and P c ( 4457 ) states journal, December 2019

Structure and decays of hidden heavy pentaquarks journal, November 2019

Strong decays of the latest LHCb pentaquark candidates in hadronic molecule pictures journal, September 2019

Nucleon resonances with hidden charm in γ p reactions journal, September 2019

Interpretation of the LHCb P c States as Hadronic Molecules and Hints of a Narrow P c ( 4380 ) journal, February 2020

Production of P c states from Λ b decay journal, December 2019

J / ψ p scattering length from GlueX threshold measurements journal, April 2020

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Decays of P c into J / ψ N and η c N with heavy quark spin symmetry journal, October 2019

Title: First Measurement of Near-Threshold $J / ψ$ Exclusive Photoproduction off the Proton

Understanding the newly observed heavy pentaquark candidates
journal, June 2016

J/ψ-Photoproduction and the gluon structure of the nucleon
journal, December 1999

Studies with cathode drift chambers for the GlueX experiment at Jefferson Lab
journal, February 2017

PHOTOS - a universal Monte Carlo for QED radiative corrections: version 2.0
journal, April 1994

Photoproduction of exotic baryon resonances
journal, January 2016

Decays of pentaquarks in hadrocharmonium and molecular scenarios
journal, December 2018

Photoproduction of charm near threshold
journal, January 2001

Soft-photon corrections to the Bethe-Heitler process in the $γ p \to l^{+} l^{-} p$ reaction
journal, April 2018

Formation of hidden-charm pentaquarks in photon-nucleon collisions
journal, August 2015

The GlueX Start Counter Detector
journal, May 2019

Observation of a Narrow Pentaquark State, $P_{c} (4312)^{+}$ , and of the Two-Peak Structure of the $P_{c} (4450)^{+}$
journal, June 2019

Photoproduction of hidden charm pentaquark states $P_{c}^{+} (4380)$ and $P_{c}^{+} (4450)$
journal, August 2015

Studying the $P_{c} (4450)$ resonance in $J / ψ$ photoproduction off protons
journal, August 2016

Holographic $J / ψ$ production near threshold and the proton mass problem
journal, October 2018

Review of Particle Physics
journal, August 2018

Construction and performance of the barrel electromagnetic calorimeter for the GlueX experiment
journal, July 2018

How to reveal the exotic nature of the $P_{c} (4450)$
journal, October 2015

Photoproduction of the $ψ (3100)$ Meson at 11 GeV
journal, December 1975

Timelike Compton scattering: exclusive photoproduction of lepton pairs
journal, April 2002

Pair spectrometer hodoscope for Hall D at Jefferson Lab
journal, September 2015

Observation of $J / ψ p$ Resonances Consistent with Pentaquark States in $Λ_{b}^{0} \to J / ψ K^{-} p$ Decays
journal, August 2015

Two-gluon form factor of the nucleon and $J / ψ$ photoproduction
journal, August 2002

Photoproduction of the $ψ$ Particles
journal, August 1975

Pentaquarks with hidden charm as hadroquarkonia
journal, January 2018

Limits and confidence intervals in the presence of nuisance parameters
journal, October 2005

Molecular interpretation of the $P_{c} (4440)$ and $P_{c} (4457)$ states
journal, December 2019

Structure and decays of hidden heavy pentaquarks
journal, November 2019

Strong decays of the latest LHCb pentaquark candidates in hadronic molecule pictures
journal, September 2019

Nucleon resonances with hidden charm in $γ p$ reactions
journal, September 2019

Interpretation of the LHCb $P_{c}$ States as Hadronic Molecules and Hints of a Narrow $P_{c} (4380)$
journal, February 2020

Production of $P_{c}$ states from $Λ_{b}$ decay
journal, December 2019

$J / ψ p$ scattering length from GlueX threshold measurements
journal, April 2020

Confronting pentaquark photoproduction with new LHCb observations
journal, September 2019

Decays of $P_{c}$ into $J / ψ N$ and $η_{c} N$ with heavy quark spin symmetry
journal, October 2019