ELFT HÍRADÓ

[Zimányiné Horváth Vera <Vera.Horvath AT eli-alps.hu>]

Előadó:                Varró Sándor (ELI ALPS)
Cím:                     Electromagnetic mass formulas for the X17 and E38 
particles derived from quantized Volkov states


Helyszín:             az ELI ALPS konferenciaterme (Szeged, Wolfgang Sandner 
utca 3.)
Időpont:             2023. szeptember 7., 9 óra

Az előadás rövid összefoglalója:

Recent observations of anomalous angular correlations of electron-positron 
pairs in several nuclear reactions have indicated the existence of a 
hypothetical neutral boson of rest mass ~17 MeV/c^2, called the X17 particle 
[1, 1b, 1c]. A similar idea may help in interpreting the other set of 
experiments on photon pair spectra around the invariant mass ~38 MeV/c^2, by 
assuming the existence of the so-called E38 particle [2]. Besides a fifth 
force explanation of the ATOMKI nuclear anomalies [3], the QED meson theory 
due to Wong [4, 4b] may reproduce quite well the above-mentioned invariant 
masses.
In the present talk we base our considerations on the exact solutions of the 
Dirac equation of the system "charged particle + a quantized electromagnetic 
plane wave", which has long been used in the quantum description of 
high-harmonic generation in mutiphoton Compton scattering [5, 5b]. We will 
show that these non-perturbative solutions, applied to the proton, lead to a 
mass term for the dressed radiation with the value (rest mass)c^2 = 17.0087 
MeV [5c]. This may perhaps be identified with the X17 vector boson resonace, 
found by the ATOMKI scientists in several experiments [1, 1b, 1c]. A similar 
considerations with the udd quarks of the neutron yields the value (rest 
mass)c^2 = 37.9938 MeV, which may correspond to the hypotetical E38 particle 
[2]. We emphasize that, besides the Sommerfeld fine structure constant and 
the proton (neutron) mass, our derived formulas contain merely some 
statistical factors, so they do not contain any adjustable parameters, like 
e.g. the flux tube radius in Wong's formalism [4b]. One of the motivations 
for giving the present talk has been to illustrate the synergy of applying 
non-perturbative strong-field and quantum optics methods, for possible 
interpretations of some particle physics phenomena, being in the frontiers of 
recent interests.

References.
[1] Krasznahorkay A J, Csatlós M, Csige L, Gácsi Z, Gulyás J, Hunyadi M, Kuti 
I, Nyakó B M, Stuhl L, Timár J, Tornyi T G, Vajta Zs, Ketel T J and 
Krasznahorkay A, Observation of anomalous internal pair creation in 8Be : a 
possible indication of a light, neutral boson. Phys. Rev. Lett. 116, 042501 
(2016). [1b] Krasznahorkay A J, et al., New anomaly observed in 12C supports 
the existence and the vector character of the hypothetical X17 boson. Phys. 
Rev. C 106,  L061601 (2022). [1c] Krasznahorkay A J, Krasznahorkay A, Csatlós 
M, Csige L and Timár J, A new particle is being born in ATOMKI that could 
make a connection to dark matter. Nucl. Phys. News 32 (2), 10-15 (2022).
[2] Abraamyan K, Austin C, Baznat M, Gudima K, Kozhin M, Reznikov S and Sorin 
A, Check of the structure in photon pairs spectra at the invariant mass of 
about 38 MeV/c2. EJP Web of Conferences 204, 08004 (2019).
[3] Feng J L, Tait T M P and Verhaaren Ch B, Dynamical evidence for a fifth 
force explanation of the ATOMKI nuclear anomalies. Phys. Rev. D 102,  036016 
(2020).
[4] Wong Ch-Y, Open string QED meson decription of the X17 particle and dark 
matter. JHEP08, 165 (2022). [4b] Wong Ch-Y,  QED meson description of the 
anomalous particles and the X17 particle. ISMD 2023 - 52nd Intl. Symp. on 
Multiparticle Dynamics, Aug 21-25 2023 - Gyöngyös, Hungary. 
https://indico.cern.ch/event/1258038/timetable/#20230822.detailed
[5] Varró S, Theoretical study of the interaction of free electrons with 
intense light. (Ph.D. dissertation, 1981). Hung. Phys. Journal XXXI, 399-454 
(1983).  [5b] Bergou J and Varró S, Nonlinear scattering processes in the 
presence of a quantised radiation field: II. Relativistic treatment. J. Phys. 
A: Math. Gen. 14, 2281-2303 (1981). [5c] Varró S, Proposal for an 
electromagnetic mass formula for the X17 particle. Talk presented at ISMD 
2023 - 52nd Intl. Symp. on Multiparticle Dynamics, August 21-25 2023 - 
Gyöngyös, Hungary. 
https://indico.cern.ch/event/1258038/timetable/#20230825.detailed

A szeminárium online is meghallgatható, a következő link használatával:
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A szeminárium angol nyelvű. Minden érdeklődőt szívesen látunk.

ZIMÁNYINÉ HORVÁTH Vera
Látogatóközpont-vezető

ELI ALPS, ELI-HU Non-Profit Ltd.
H-6728 Szeged, Wolfgang Sandner utca 3.
Mobil: +36 70 491 14 12
E-mail: Vera.Horvath AT eli-alps.hu
Honlap: www.eli-alps.hu<http://www.eli-alps.hu/>
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