Search for a new gauge boson in the $A'$ Experiment (APEX)
We present a search at Jefferson Laboratory for new forces mediated by sub-GeV vector bosons with weak coupling {alpha}' to electrons. Such a particle A' can be produced in electron-nucleus fixed-target scattering and then decay to an e{sup +}e{sup -} pair, producing a narrow resonance in...
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| Veröffentlicht in: | Physical review letters 2011-11, Vol.107 (19) |
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| creator | Abrahamyan, S Allada, K Anez, D Averett, T Barbieri, A Bartlett, K Beacham, J Bono, J Boyce, J R Brindza, P Camsonne, A Cranmer, K Dalton, M M de Jager, C W Donaghy, J Essig, R Field, C Folts, E Gasparian, A Goeckner-Wald, N Gomez, J Graham, M Hansen, J -O Higinbotham, D W Holmstrom, T Huang, J Iqbal, S Jaros, J Jensen, E Kelleher, A Khandaker, M LeRose, J J Lindgren, R Liyanage, N Long, E Mammei, J Markowitz, P Maruyama, T Maxwell, V Mayilyan, S McDonald, J Michaels, R Moffeit, K Nelyubin, V Odian, A Oriunno, M Partridge, R Paolone, M Piasetzky, E Pomerantz, I Qiang, Y Riordan, S Roblin, Y Sawatzky, B Schuster, P Segal, J Selvy, L Shahinyan, A Subedi, R Sulkosky, V Stepanyan, S Toro, N Walz, D Wojtsekhowski, B Zhang, J |
| description | We present a search at Jefferson Laboratory for new forces mediated by sub-GeV vector bosons with weak coupling {alpha}' to electrons. Such a particle A' can be produced in electron-nucleus fixed-target scattering and then decay to an e{sup +}e{sup -} pair, producing a narrow resonance in the QED trident spectrum. Using APEX test run data, we searched in the mass range 175-250 MeV, found no evidence for an A' {yields} e{sup +}e{sup -} reaction, and set an upper limit of {alpha}'/{alpha} {approx} 10{sup -6}. Our findings demonstrate that fixed-target searches can explore a new, wide, and important range of masses and couplings for sub-GeV forces. |
| doi_str_mv | 10.1103/PhysRevLett.107.191804 |
| format | Article |
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Our findings demonstrate that fixed-target searches can explore a new, wide, and important range of masses and couplings for sub-GeV forces.</description><subject>BOSONS</subject><subject>CEBAF ACCELERATOR</subject><subject>DECAY</subject><subject>ELECTRONS</subject><subject>PARTICLE ACCELERATORS</subject><subject>RESONANCE</subject><subject>SCATTERING</subject><subject>VECTORS</subject><issn>0031-9007</issn><issn>1079-7114</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2011</creationdate><recordtype>article</recordtype><recordid>eNqNjrsKwkAQAA9RMD5-QRYR1CJx14gxdiIRC4ugFnYhHhsT0TvJna-_18IPsBoGphghOoQeEfqjOH-bLT82bK1HGHgU0gwnFeF8JXQDoklVOIg-uSFiUBcNY86ISOPpzBHzHaelzCHTJaSg-Amn9H5iOGqjFRQKbM7QW_R7EL1uXBZXVhYGizg6DFuilqUXw-0fm6K7ivbLtauNLRIjC8syl1opljYhHIffMf-v6AOdnj2E</recordid><startdate>20111101</startdate><enddate>20111101</enddate><creator>Abrahamyan, S</creator><creator>Allada, K</creator><creator>Anez, D</creator><creator>Averett, 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| fulltext | fulltext |
| identifier | ISSN: 0031-9007 |
| ispartof | Physical review letters, 2011-11, Vol.107 (19) |
| issn | 0031-9007 1079-7114 |
| language | eng |
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| source | American Physical Society Journals |
| subjects | BOSONS CEBAF ACCELERATOR DECAY ELECTRONS PARTICLE ACCELERATORS RESONANCE SCATTERING VECTORS |
| title | Search for a new gauge boson in the $A'$ Experiment (APEX) |
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