8 correction of information edited Sep 17 '13 at 8:54 steveOw 32111 silver badge1212 bronze badges Alvager et al 1964 purportedly disproved Ritz's emitter theory in an experiment that generated neutral pions with a vellocity of $$v =B.c$$ where B is slightly smaller than one. How is the velocity of a neutral pion determined? Does the determination invoke special relativity? Added: Alvager et al (http://mysite.verizon.net/cephalobus_alienus/papers/Alvager_et_al_1964.pdf) beamed a burst of high energy protons at a beryllium crystal and measured arrival times of burst of emitted photons at downstream detectors. Their theory said that the photons were emitted from decay of neutral pions produced from collision of gamma particlesthe protons with beryllium and that these pions had a speed of $$v = B.c$$. Time intervals between output burst being detected at different detectors indicated that photons were travelling at very close to $$1.0c$$ rather than at a range of values between $$c -k.B.c$$ and $$c + k.B.c$$ with $$k>0$$ which (they said) would have been the case if emission/ballistic/galilean theory/model applied. ( Sorry I dont know where I got my earlier value of $$k.B = 0.2$$ from). I pose the question because it seems that Alvager et al were trying to prove special relativity (SR) by assuming pion velocities which were themselves determined assuming SR. Anna V has answered the question of pion velocity measurement for me (Thankyou!). Regarding the interpretation of the Alvager experiment the following note is interesting: (http://worldnpa.org/pipermail/memberschat_worldnpa.org/attachments/20090115/db6f6bc5/attachment.pdf). Alvager et al 1964 purportedly disproved Ritz's emitter theory in an experiment that generated neutral pions with a vellocity of $$v =B.c$$ where B is slightly smaller than one. How is the velocity of a neutral pion determined? Does the determination invoke special relativity? Added: Alvager et al (http://mysite.verizon.net/cephalobus_alienus/papers/Alvager_et_al_1964.pdf) beamed a burst of high energy protons at a beryllium crystal and measured arrival times of burst of emitted photons at downstream detectors. Their theory said that the photons were emitted from decay of neutral pions produced from collision of gamma particles with beryllium and that these pions had a speed of $$v = B.c$$. Time intervals between output burst being detected at different detectors indicated that photons were travelling at very close to $$1.0c$$ rather than at a range of values between $$c -k.B.c$$ and $$c + k.B.c$$ with $$k>0$$ which (they said) would have been the case if emission/ballistic/galilean theory/model applied. ( Sorry I dont know where I got my earlier value of $$k.B = 0.2$$ from). I pose the question because it seems that Alvager et al were trying to prove special relativity (SR) by assuming pion velocities which were themselves determined assuming SR. Anna V has answered the question of pion velocity measurement for me (Thankyou!). Regarding the interpretation of the Alvager experiment the following note is interesting: (http://worldnpa.org/pipermail/memberschat_worldnpa.org/attachments/20090115/db6f6bc5/attachment.pdf). Alvager et al 1964 purportedly disproved Ritz's emitter theory in an experiment that generated neutral pions with a vellocity of $$v =B.c$$ where B is slightly smaller than one. How is the velocity of a neutral pion determined? Does the determination invoke special relativity? Added: Alvager et al (http://mysite.verizon.net/cephalobus_alienus/papers/Alvager_et_al_1964.pdf) beamed a burst of high energy protons at a beryllium crystal and measured arrival times of burst of emitted photons at downstream detectors. Their theory said that the photons were emitted from decay of neutral pions produced from collision of the protons with beryllium and that these pions had a speed of $$v = B.c$$. Time intervals between output burst being detected at different detectors indicated that photons were travelling at very close to $$1.0c$$ rather than at a range of values between $$c -k.B.c$$ and $$c + k.B.c$$ with $$k>0$$ which (they said) would have been the case if emission/ballistic/galilean theory/model applied. ( Sorry I dont know where I got my earlier value of $$k.B = 0.2$$ from). I pose the question because it seems that Alvager et al were trying to prove special relativity (SR) by assuming pion velocities which were themselves determined assuming SR. Anna V has answered the question of pion velocity measurement for me (Thankyou!). Regarding the interpretation of the Alvager experiment the following note is interesting: (http://worldnpa.org/pipermail/memberschat_worldnpa.org/attachments/20090115/db6f6bc5/attachment.pdf). 7 additional information. edited Sep 15 '13 at 15:05 steveOw 32111 silver badge1212 bronze badges Alvager et al 1964 purportedly disproved Ritz's emitter theory in an experiment that generated neutral pions with a vellocity of $$v =B.c$$ where B is slightly smaller than one. How is the velocity of a neutral pion determined? Does the determination invoke special relativity? Added: Alvager et al (http://mysite.verizon.net/cephalobus_alienus/papers/Alvager_et_al_1964.pdf) beamed a burst of high energy protons at a beryllium crystal and measured arrival times of burst of emitted photons at downstream detectors. Their theory said that the photons were emitted from decay of neutral pions produced from collision of gamma particles with beryllium and that these pions had a speed of $$v = B.c$$. Time intervals between output burst being detected at different detectors indicated that photons were travelling at very close to $$1.0c$$ rather than at a range of values between $$c -k.B.c$$ and $$c + k.B.c$$ with $$k>0$$ which (they said) would have been the case if emission/ballistic/galilean theory/model applied. ( Sorry I dont know where I got my earlier value of $$k.B = 0.2$$ from). I pose the question because it seems that Alvager et al were trying to prove special relativity (SR) by assuming pion velocities which were themselves determined assuming SR. Anna V has answered the question of pion velocity measurement for me (Thankyou!). Regarding the interpretation of the Alvager experiment the following note is interesting: (http://worldnpa.org/pipermail/memberschat_worldnpa.org/attachments/20090115/db6f6bc5/attachment.pdf). Alvager et al 1964 purportedly disproved Ritz's emitter theory in an experiment that generated neutral pions with a vellocity of $$v =B.c$$ where B is slightly smaller than one. How is the velocity of a neutral pion determined? Does the determination invoke special relativity? Added: Alvager et al (http://mysite.verizon.net/cephalobus_alienus/papers/Alvager_et_al_1964.pdf) beamed a burst of high energy protons at a beryllium crystal and measured arrival times of burst of emitted photons at downstream detectors. Their theory said that the photons were emitted from decay of neutral pions produced from collision of gamma particles with beryllium and that these pions had a speed of $$v = B.c$$. Time intervals between output burst being detected at different detectors indicated that photons were travelling at very close to $$1.0c$$ rather than at a range of values between $$c -k.B.c$$ and $$c + k.B.c$$ with $$k>0$$ which (they said) would have been the case if emission/ballistic/galilean theory/model applied. ( Sorry I dont know where I got my earlier value of $$k.B = 0.2$$ from). I pose the question because it seems that Alvager et al were trying to prove special relativity (SR) by assuming pion velocities which were themselves determined assuming SR. Alvager et al 1964 purportedly disproved Ritz's emitter theory in an experiment that generated neutral pions with a vellocity of $$v =B.c$$ where B is slightly smaller than one. How is the velocity of a neutral pion determined? Does the determination invoke special relativity? Added: Alvager et al (http://mysite.verizon.net/cephalobus_alienus/papers/Alvager_et_al_1964.pdf) beamed a burst of high energy protons at a beryllium crystal and measured arrival times of burst of emitted photons at downstream detectors. Their theory said that the photons were emitted from decay of neutral pions produced from collision of gamma particles with beryllium and that these pions had a speed of $$v = B.c$$. Time intervals between output burst being detected at different detectors indicated that photons were travelling at very close to $$1.0c$$ rather than at a range of values between $$c -k.B.c$$ and $$c + k.B.c$$ with $$k>0$$ which (they said) would have been the case if emission/ballistic/galilean theory/model applied. ( Sorry I dont know where I got my earlier value of $$k.B = 0.2$$ from). I pose the question because it seems that Alvager et al were trying to prove special relativity (SR) by assuming pion velocities which were themselves determined assuming SR. Anna V has answered the question of pion velocity measurement for me (Thankyou!). Regarding the interpretation of the Alvager experiment the following note is interesting: (http://worldnpa.org/pipermail/memberschat_worldnpa.org/attachments/20090115/db6f6bc5/attachment.pdf). 6 deleted 30 characters in body edited Sep 14 '13 at 20:30 steveOw 32111 silver badge1212 bronze badges Alvager et al 1964 purportedly disproved Ritz's emitter theory in an experiment that generated neutral pions with a speedvellocity of $$k.c$$$$v =B.c$$ where kB is significantly largeslightly smaller than zeroone. How is the velocity of a neutral pion determined? Does the determination invoke special relativity? Added: Alvager et al (http://mysite.verizon.net/cephalobus_alienus/papers/Alvager_et_al_1964.pdf) beamed a burst of high energy protons at a beryllium crystal and measured arrival times of burst of emitted photons at downstream detectors. Their theory said that the photons were emitted from decay of neutral pions produced from collision of gamma particles with beryllium and that these pions had a speed of $$v = k.c$$ where k is sufficiently large than zero to be measurable$$v = B.c$$. Time intervalintervals between output burst being detected at different detectors indicated that photons were travelling at very close to $$1.0c$$ rather than at a range of values between $$c -k.c$$$$c -k.B.c$$ and $$c +k.c$$$$c + k.B.c$$ with $$k>0$$ which (they said) would have been the case if emission/ballistic/galilean theory/model applied. ( Sorry I cant rememberdont know where I got themy earlier value of k = 0.2$$k.B = 0.2$$ from). I pose the question because it seems that Alvager et al were trying to prove special relativity (SR) by assuming pion velocities which were themselves determined assuming SR. Alvager et al 1964 purportedly disproved Ritz's emitter theory in an experiment that generated neutral pions with a speed of $$k.c$$ where k is significantly large than zero. How is the velocity of a neutral pion determined? Does the determination invoke special relativity? Added: Alvager et al (http://mysite.verizon.net/cephalobus_alienus/papers/Alvager_et_al_1964.pdf) beamed a burst of high energy protons at a beryllium crystal and measured arrival times of burst of emitted photons at downstream detectors. Their theory said that the photons were emitted from decay of neutral pions produced from collision of gamma particles with beryllium and that these pions had a speed of $$v = k.c$$ where k is sufficiently large than zero to be measurable. Time interval between output burst being detected at different detectors indicated that photons were travelling at very close to $$1.0c$$ rather than at a range of values between $$c -k.c$$ and $$c +k.c$$ which (they said) would have been the case if emission/ballistic/galilean theory/model applied. ( Sorry I cant remember where I got the value of k = 0.2 from). I pose the question because it seems that Alvager et al were trying to prove special relativity (SR) by assuming pion velocities which were themselves determined assuming SR. Alvager et al 1964 purportedly disproved Ritz's emitter theory in an experiment that generated neutral pions with a vellocity of $$v =B.c$$ where B is slightly smaller than one. How is the velocity of a neutral pion determined? Does the determination invoke special relativity? Added: Alvager et al (http://mysite.verizon.net/cephalobus_alienus/papers/Alvager_et_al_1964.pdf) beamed a burst of high energy protons at a beryllium crystal and measured arrival times of burst of emitted photons at downstream detectors. Their theory said that the photons were emitted from decay of neutral pions produced from collision of gamma particles with beryllium and that these pions had a speed of $$v = B.c$$. Time intervals between output burst being detected at different detectors indicated that photons were travelling at very close to $$1.0c$$ rather than at a range of values between $$c -k.B.c$$ and $$c + k.B.c$$ with $$k>0$$ which (they said) would have been the case if emission/ballistic/galilean theory/model applied. ( Sorry I dont know where I got my earlier value of $$k.B = 0.2$$ from). I pose the question because it seems that Alvager et al were trying to prove special relativity (SR) by assuming pion velocities which were themselves determined assuming SR. 5 extra information edited Sep 14 '13 at 20:00 steveOw 32111 silver badge1212 bronze badges 4 extra information edited Sep 14 '13 at 19:49 steveOw 32111 silver badge1212 bronze badges 3 added 636 characters in body edited Sep 14 '13 at 19:20 steveOw 32111 silver badge1212 bronze badges 2 added 1 characters in body; edited tags; edited title edited Sep 12 '13 at 22:43 Qmechanic♦ 111k1212 gold badges214214 silver badges13111311 bronze badges 1 asked Sep 12 '13 at 22:39 steveOw 32111 silver badge1212 bronze badges